Ex-2.2, Fractions, Class 7, Math RD Sharma Solutions | RD Sharma Solutions for Class 7 Mathematics PDF Download

QUESTION 1:

Multiply:

ANSWER 1:

(ii)

(iii)

(iv)

QUESTION 2:

Find the product:

ANSWER 2:

(ii)

(iii)

(iv)

QUESTION 3:

Simplify:

ANSWER 3:

(ii)

(iii)

QUESTION 4:

Find:

ANSWER 4:

QUESTION 5:

Which is greater?

ANSWER 5:

convert  2/7 to its equivalent fraction with denominator as 14

we know 6>4

QUESTION 6:

Find:

(i) 7/11 of Rs 330
(ii) 5/9 of 108 metres
(iii) 3/7 of 42 litres
(iv) 1/12 of an hour
(v) 5/6 of an year
(vi) 3/20 of a kg
(vii) 7/20 of a litre
(viii) 5/6 of a day
(ix) 2/7 of a week 

ANSWER 6:

1 year =12 months

1 kg =1000 g

1 l =1000 ml

Question 8:

Ravish reads 1/3 part of a book in 1 hour. How much part of the book will he read in  houurs?

Answer 8:

In 1 hour Ravish reads 1/3 of the book

Part of book Ravish will read in 11/5 hours = Part read in 1 hour × 11/15

Part of book Ravish will read in 11/5 hours  =

Question 9:

Lipika reads a book for      hours everyday. She reads the entire book in 6 days. How many hours in all were required by her to read the book?

Answer 9:

In one day, Lipika reads for

Total hours required 

Question 10:

Find the area of a rectangular park which is   m long and   m broad.

Answer 10:

Length of rectangular park 

⇒Length of rectangular park  = 125/3 m

Width of rectangular park =  

⇒Width of rectangular park  = 93/5 m

Area of rectangular park = Length of rectangular park × Width of rectangular park

Area of rectangular park =  

Question 11:

If milk is available at Rs    per litre, find the cost of   litres of milk.

Answer 11:

Cost of 1 litre milk = Rs. 

⇒Cost of 1 litre milk =Rs. 71/4

Cost of 37/5litres milk = Cost of 1 litre milk x 37/5 

Cost of 37/5litres milk 

Question 12:

Sharda can walk   km813 km in one hour. How much distance will she cover in   hours?

Answer 12:

Distance covered by ​Sharda in 1 hour =  25/3 km.

Distance covered by Sharda in 12/5hours = Distance covered in 1 hour × (12/50

⇒⇒Distance covered by Sharda in 12/5 hours = 

Question 13:

A sugar bag contains 30 kg of sugar. After consuming 2/3 of it, how much sugar is left in the bag?

Answer 13:

Total amount of sugar in the bag = 30 kg

⇒Amount of sugar consumed = 20 kg

Sugar left in the bag = Total amount of sugar in the bag − Amount of sugar consumed 

Sugar left in the bag = 30−20 =10 kg

Question 14:

Each side of a square is   m long. Find its area

Answer 14:

Area of square=Side × Side

Question 15:

There are 45 students in a class and 3/5 of them are boys. How many girls are there in the class?

Answer 15:

Therefore, 27 students are boys. 

Number of girls=Total number of students in the class − Number of boys

Number of girls=45−27=18

Therefore, 18 students are girls.