Test: Comparing Quantities- 1 - Class 8 MCQ

Speed of cycle = 15 km per hour 

Speed of scooter = 30 km per hour 

∴ 

Cost of refrigerator = Rs 2500

Money spent on repairs = Rs 500

Total CP of refrigerator = Rs 2500 + 500 = Rs 3000

SP of refrigerator = Rs 3300

Since SP > CP, so profit ocurrs.

Now, profit = SP − CP = 3300 − 3000 = Rs 300

Girls are 60% of the total number of students and are 18 in number.

Let say total students = T

Girls = (60/100)T

=> 18 = 3T/5

=> T = 30

Boys = 30 - 18  = 12

Ratio of Girls to boys = 18 : 12

=> 3 : 2

Discount percentage = 10%

The marked price of a pair of jeans = ₹ 1450

Marked Price of a shirt = ₹ 850

(i) M.P. of a pair of jeans = C.P. of two jeans - Discount

(ii) M.P. of a shirt = C.P. of two shirts - Discount

Adding (i) and (ii) will give the amount he has to pay.

M.P of a pair of jeans = 1450

M.P of 2 shirts = 850 × 2 = 1700

Total M.P. = 1450 + 1700 = 3150

Discount on Total M.P =10% of 3150

= (10/100) × 3150

= 315

The amount customer has to pay is = Total M.P - Discount on total M.p

= 3150 - 315 = ₹ 2835

Given:
Rs. 10,800 for 3 years at 12.5% per annum is compounded annually. We have to find the final amount at the end of three years. This can be easily done as-
Substituting P = 10800, r = 12.5 and t = 3,

The total amount when Rs. 10,800 for 3 years at 12.5% per annum is compounded annually is Rs. 15377.343. This is the required answer.

Difference between interests = Rs.220 - Rs. 200 = Rs. 20
⇒ Rs. 20 is the S.I on Rs. 200 for 1 Year.

Hence, the rate of interest is 10%.

We have,
P = 20,000, R = 5%, T = 3 year

= 23153

A ratio is a relationship between two numbers indicating how many times the first number contains the second.
Example: If a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons = 8:6 = 4:3

Thus, Present price is Rs 40,800.