Top Class 8 Doubts this Week - Ask Doubt

Which of the following sentences is in the future perfect tense?
a)
She is going to travel to Europe next summer.
b)
They will have finished the project by the end of the week.
c)
He was going to call his mother later in the day.
d)
We had been planning the party for weeks.
Correct answer is option 'B'. Can you explain this answer?

Smita mehta answered • Nov 03, 2024
Class 8

Future Perfect Tense Explanation:
The future perfect tense is used to describe an action that will be completed in the future before another action takes place. It is formed by using "will have" followed by the past participle of the verb.

Explanation of Option B:
- They will have finished the project by the end of the week.
This sentence is in the fu... more

View Answers

Needed a Document for Social Studies (SST) Class 8? Macmillan Footprints
Related: Social Studies (SST) Class 8
?

Nitin Majumdar answered • Mar 10, 2024
Class 8

Macmillan Footprints: Social Studies (SST) Class 8

Exploring the world of social studies in Class 8 through Macmillan Footprints offers a comprehensive and engaging learning experience. Here is an overview of what you can expect from this textbook:

1. Rich Content:
- Macmillan Footprints for Class 8 covers a wide range of topics including history, geo... more

View Answers

Fill in the blanks with the most appropriate words:
__long walk incountry is very interesting.
a)
a/the
b)
the/a
c)
the/the
d)
a/a
e)
no article/the
Correct answer is option 'A'. Can you explain this answer?

Parth Basu answered • Feb 13, 2025
Class 8

Understanding Articles in English
When filling in the blanks in the sentence "______ long walk in ____ country is very interesting," it's essential to understand the usage of articles in English.
Choice of Articles
- "A" vs. "The":
- "A" is an indefinite article used when referring to something for the first time or when it is not specific.
- "The"... more

View Answers

List out five resources we use in our homes and five we use in our classroom .?

Pragati Basak answered • Jul 27, 2020
Class 8

Resources used in Homes:

1. Electricity: Electricity is a basic resource used in almost every home. It is used to power lighting, heating, cooling, and various home appliances such as refrigerators, washing machines, and televisions.

2. Water: Water is another important resource used in homes. It is used for drinking, cooking, cleaning, and bathing. Water... more

View Answers

I want a coupon code for the highest discount on Edurev?

Jaideep Nair answered • Aug 30, 2024
Class 8

Finding the Best Coupon Codes for Edurev
To acquire the highest discount on Edurev, you can follow these steps to ensure you find the most beneficial coupon codes available.

1. Sign Up for Newsletters
- Subscribe to Edurev’s newsletter.
- This often provides exclusive deals and coupon codes directly to your inbox.

2. Check the Official Website<... more

View Answers

Attach

Reply to Jaideep Nair Answer to Question

Solve: 5x−2(2x−7)=(3x−1)+7/2

a)
2

b)
3

c)
1/2

d)
23/4

Correct answer is 'D'. Can you explain this answer?

Sanjana Bose answered • Jun 24, 2024
Class 8

5x-2(2x-7) = 2(3x-1)+7/2After opening the brackets5x-4x+14=6x-2+7/2Taking X to one side constants to other side6x+4x-5x= 14+2-7/2 or 5x= 16-7/2or 5x = (32-7)/2 or 5x= 25/2or x= 5/2

View Answers

Attach

Reply to Sanjana Bose Answer to Question

Subtract 489 from 1000 using the base method. What is the result?
a)
521
b)
511
c)
501
d)
491
Correct answer is option 'B'. Can you explain this answer?

Surbhi Patel answered • 4 weeks ago
Class 8

Understanding the Problem
To solve the problem of subtracting 489 from 1000 using the base method, we can break it down into simpler steps. The base method involves using a reference point (in this case, 1000) to simplify the calculation.
Steps to Solve
1. Identify the Base:
- The base here is 1000.
2. Subtract the Number:
- We need to ... more

View Answers

Attach

Reply to Surbhi Patel Answer to Question

Which sentence is correct?
a)
An boy was playing in the park.
b)
A boy was playing in the park.
c)
The boy was playing in the park.
d)
None of these
Correct answer is option 'B'. Can you explain this answer?

Udexy Coaching Center answered • Aug 13, 2023
Class 8

The article "a" is used before "boy" to indicate that the speaker is referring to any boy in general.

View Answers

Attach

Reply to Udexy Coaching Center Answer to Question

When a load is suspended from a spring, what happens to the spring?
a)
The spring pulls the load, creating a gravitational pull
b)
The load pulls the spring, causing it to stretch
c)
The hook compresses the spring, changing its shape
d)
The wall moves the hook, changing its motion
Correct answer is option 'B'. Can you explain this answer?

BT Educators answered • 4 weeks ago
Class 8

When a load is suspended from a spring, the load pulls the spring, causing it to stretch. This phenomenon can be explained by Hooke's law, which describes the relationship between the force applied to the spring and the resulting extension or compression of the spring. This demonstrates the concept of elastic deformation in materials subjected to external forces.

View Answers

Attach

Reply to BT Educators Answer to Question

I want some discount on EduRev Infinity, is there any coupon code available for this?

Abhiram Chavan answered • Dec 21, 2019
Class 8

Discount on EduRev Infinity

Yes, there are coupon codes available for EduRev Infinity that can help you get a discount on your subscription. Here's what you need to know:

1. Coupon codes are offered by EduRev from time to time, especially during special occasions and festivals.

2. These coupon codes can be found on EduRev's website, social media pages, or through e... more

View Answers

Attach

Reply to Abhiram Chavan Answer to Question

What is the largest desert in the world?
a)
Antarctic Desert
b)
Gobi Desert
c)
Kalahari Desert
d)
Atacama Desert
Correct answer is option 'A'. Can you explain this answer?

Harsh mehra answered • Mar 17, 2025
Class 8

Understanding Deserts
Deserts are arid regions characterized by low precipitation, extreme temperatures, and sparse vegetation. While many people think of deserts as hot and sandy, the largest desert in the world is actually cold.
Largest Desert in the World
- Antarctic Desert:
- The Antarctic Desert is classified as a polar desert, covering approximately... more

View Answers

Attach

Reply to Harsh mehra Answer to Question

Find CI on a sum of rupees 8000 for 2 years at 5% per annum compounded annually?

Nishanth Ghosh answered • Sep 14, 2018
Class 8

Calculating Compound Interest

To find the compound interest (CI) on a sum of rupees 8000 for 2 years at an annual interest rate of 5% compounded annually, we can use the formula:

CI = P * (1 + R/100)^T - P

Where:
CI = Compound Interest
P = Principal amount (initial sum)
R = Rate of interest per annum
T = Time period in years

... more>Step 1: Identifying the Variables

In this case, we have:
P = 8000 rupees (the initial sum)
R = 5% (the annual interest rate)
T = 2 years (the time period)

Step 2: Substituting the Values into the Formula

Now, let's substitute the given values into the formula and calculate the compound interest:

CI = 8000 * (1 + 5/100)^2 - 8000
= 8000 * (1 + 0.05)^2 - 8000
= 8000 * (1.05)^2 - 8000
= 8000 * 1.1025 - 8000
= 8820 - 8000
= 820 rupees

Step 3: Interpretation of the Result

Therefore, the compound interest on a sum of rupees 8000 for 2 years at an annual interest rate of 5% compounded annually is 820 rupees. This means that after 2 years, the initial sum of 8000 rupees will have grown to 8820 rupees.

Compound interest is different from simple interest as it takes into account the interest earned on the principal amount as well as the interest accumulated over time. This leads to a higher total interest earned compared to simple interest.

In Summary:
- Principal amount (P) = 8000 rupees
- Annual interest rate (R) = 5%
- Time period (T) = 2 years
- Compound Interest (CI) = 820 rupees

By using the compound interest formula, we have calculated the compound interest to be 820 rupees.

View Answers

Choose the option that best corrects the underlined phrase.Every astronaut in the team have to follow a strict dietary regimen.
a)
NO CHANGE
b)
have to abide by
c)
has to adhere to
d)
has to follows
Correct answer is option 'C'. Can you explain this answer?

Talent Skill Learning answered • Jan 05, 2024
Class 8

Though we are speaking about a team, the sentence uses the word 'every'. 'Every' is always followed by a verb in the singular form. Hence, the correct answer is C) Has to adhere to.
Option D also has the singular word 'has', but is incorrect as it also contains the word 'follows', making it grammatically incorrect.

View Answers

If 3 men or 6 women can do a piece of work in 16 days, in how many days can 12 men and 8 women do the same piece of work?
a)
4 days
b)
5 days
c)
3 days
d)
2 days.
Correct answer is option 'C'. Can you explain this answer?

Sahil Gupta answered • Jan 21, 2020
Class 8

3m = 6w

So 12m + 8w = 24w + 8w = 32w

Since 6 women can complete work in 16 days, 32 women can complete it in :

16 x 6/32 = 3 days.

View Answers

What is the difference between longitude and latitude?

Prateek Ghoshal answered • Feb 07, 2022
Class 8

Longitude and Latitude

Longitude and latitude are two important terms used in geography and cartography which help to locate and identify any place on the earth's surface. They are imaginary lines that run across the earth's surface and help us to navigate and understand the world around us. Though they are both related to the location of a place, they differ in many aspects. Here are some of the key differences between longitude and latitude:

... more

View Answers

Using the Shudh method, find 3 + 8 + 9 + 5 + 4.
a)
27
b)
28
c)
29
d)
30
Correct answer is option 'C'. Can you explain this answer?

Rounak Chawla answered • Mar 19, 2025
Class 8

Understanding the Shudh Method
The Shudh method is a straightforward approach used in arithmetic to simplify problems and find the correct answer without confusion. Let's break down the addition problem step by step.
Given Values
- 3
- 8
- 9
- 5
- 4
Step-by-Step Addition
1. Add the first two numbers:
- 3 + 8 = 11
2... more

View Answers

The most appropriate unit to measure distance between two cities is
a)
kilometer
b)
centimetre
c)
metre
d)
mile
Correct answer is option 'A'. Can you explain this answer?

Muskaan reddy answered • Jan 31, 2025
Class 8

Understanding Distance Measurement
When measuring the distance between two cities, the most appropriate unit is the kilometer. Here’s why:
1. Scale of Measurement
- Cities are generally located miles apart, often requiring measurements in a larger scale.
- Kilometers provide a suitable unit that balances precision and practicality for longer distances.
2. ... moreCommon Usage
- The kilometer is the standard unit of distance in most countries around the world, especially those using the metric system.
- It is widely recognized and used for road signs, maps, and navigation, making it easily understood by most people.
3. Comparison with Other Units
- Centimeters and meters are too small for measuring distances between cities:
- Centimeter: Too small; not practical for long distances.
- Meter: While useful for shorter distances, it lacks the scale needed for city-to-city measurements.
- Miles, though commonly used in some countries (like the USA), are less universal compared to kilometers.
4. Practical Examples
- The distance between New York City and Los Angeles is approximately 4,000 kilometers.
- Using kilometers allows for easier comparison and understanding of distances on a global scale.
In conclusion, kilometers are the most appropriate and practical unit for measuring distances between cities, given their scale, common usage, and ease of understanding.

View Answers

Consider the following pairs:
1. Satluj River - Originates from Beas Kund
2. Ravi River - Originates from Bara Bhangal Glacier
3. Yamuna River - Forms the eastern boundary of Himachal Pradesh with Uttarakhand
4. Spiti River - Joins the Satluj River near Khab
How many pairs given above are correctly matched?
a)
Only one pair
b)
Only two pairs
c)
Only three pairs
d)
All four pairs
Correct answer is option 'C'. Can you explain this answer?

S.S Career Academy answered • Nov 15, 2024
Class 8

1. Satluj River - Incorrectly matched. The Satluj River originates from Rakas Lake in Tibet, not from Beas Kund.

2. Ravi River - Correctly matched. The Ravi River originates from the Bara Bhangal Glacier in the Himalayas.

3. Yamuna River - Correctly matched. The Yamuna River forms the eastern boundary of Himachal Pradesh with Uttarakhand.

4. Spiti River - Correctly matched. The Spiti River joins the Satluj River near Khab.

Thus, pairs 2, 3, and 4 are correctly matched.

View Answers

Which sentence is correct?
a)
He is going to give an lecture on economics.
b)
He is going to give a lecture on economics.
c)
He is going to give the lecture on economics.
d)
None of these
Correct answer is option 'B'. Can you explain this answer?

Prasad Singh answered • Dec 27, 2023
Class 8

Explanation:

Introduction:
The sentence "He is going to give a lecture on economics." is the correct sentence among the given options. This response will explain why option B is the correct answer.

Explanation:
- Option A: "He is going to give an lecture on economics."
This sentence is incorrect because the indefinite article "an" should no... more

View Answers

Needed a Document for Social Studies (SST) Class 8? Macmillan Footprints
Related: Social Studies (SST) Class 8
?

Fill in the blanks with the most appropriate words:
__long walk incountry is very interesting.
a)
a/the
b)
the/a
c)
the/the
d)
a/a
e)
no article/the
Correct answer is option 'A'. Can you explain this answer?

List out five resources we use in our homes and five we use in our classroom .?

I want a coupon code for the highest discount on Edurev?

Solve: 5x−2(2x−7)=(3x−1)+7/2

a)
2

b)
3

c)
1/2

d)
23/4

Correct answer is 'D'. Can you explain this answer?

Subtract 489 from 1000 using the base method. What is the result?
a)
521
b)
511
c)
501
d)
491
Correct answer is option 'B'. Can you explain this answer?

Which sentence is correct?
a)
An boy was playing in the park.
b)
A boy was playing in the park.
c)
The boy was playing in the park.
d)
None of these
Correct answer is option 'B'. Can you explain this answer?

I want some discount on EduRev Infinity, is there any coupon code available for this?

What is the largest desert in the world?
a)
Antarctic Desert
b)
Gobi Desert
c)
Kalahari Desert
d)
Atacama Desert
Correct answer is option 'A'. Can you explain this answer?

Find CI on a sum of rupees 8000 for 2 years at 5% per annum compounded annually?

Choose the option that best corrects the underlined phrase.Every astronaut in the team have to follow a strict dietary regimen.
a)
NO CHANGE
b)
have to abide by
c)
has to adhere to
d)
has to follows
Correct answer is option 'C'. Can you explain this answer?

If 3 men or 6 women can do a piece of work in 16 days, in how many days can 12 men and 8 women do the same piece of work?
a)
4 days
b)
5 days
c)
3 days
d)
2 days.
Correct answer is option 'C'. Can you explain this answer?

What is the difference between longitude and latitude?

Using the Shudh method, find 3 + 8 + 9 + 5 + 4.
a)
27
b)
28
c)
29
d)
30
Correct answer is option 'C'. Can you explain this answer?

The most appropriate unit to measure distance between two cities is
a)
kilometer
b)
centimetre
c)
metre
d)
mile
Correct answer is option 'A'. Can you explain this answer?

Which sentence is correct?
a)
He is going to give an lecture on economics.
b)
He is going to give a lecture on economics.
c)
He is going to give the lecture on economics.
d)
None of these
Correct answer is option 'B'. Can you explain this answer?

Schools

Competitive Examinations

Quick Access Links

Technical Exams

Needed a Document for Social Studies (SST) Class 8? Macmillan Footprints Related: Social Studies (SST) Class 8?

Needed a Document for Social Studies (SST) Class 8? Macmillan Footprints
Related: Social Studies (SST) Class 8
?