R S Aggarwal Solutions for Chapter: Concept of Perimeter and Area, Exercise 5: EXERCISE 21E

The length of the diagonal of a square is $20 \mathrm{cm}$. It area is

The cost of putting a fence around a square field at $₹25$ per metre is $₹2000$. The length of each side of the field is

The diameter of a circle is $7 \mathrm{cm}$. Its circumference is

The circumference of a circle is $88 \mathrm{cm}$. Its diameter is

The diameter of a wheel of a car is $70 \mathrm{cm}$. How much distance will it cover in making $50$ revolutions?

A lane $150 \mathrm{m}$ long and $9 \mathrm{m}$ wide is to be paved with bricks, each measuring $22.5 \mathrm{cm}$ by $7.5 \mathrm{cm}$. How many bricks are required?

A room is $5 \mathrm{m} 40 \mathrm{cm}$ long and $4 \mathrm{m} 50 \mathrm{cm}$ broad. Its area is

How many envelopes can be made out of a sheet of paper $72 \mathrm{cm}$ by $48 \mathrm{cm},$ if each envelope requires a paper of size $18 \mathrm{cm}$ by$12 \mathrm{cm}$?