R S Aggarwal Solutions for Chapter: Concept of Perimeter and Area, Exercise 1: EXERCISE 21A

The cost of fencing a rectangular field at $₹18 \mathrm{per} \mathrm{metre}$ is $₹1980$. If the width of the field is $23 \mathrm{m}$ and its length in $k \mathrm{m}$, then find the value of $k$.

The cost of putting a fence around a square field at$₹35$ per meter is $₹4480$. Find the length of each side of the field.

Find the perimeter of

a regular pentagon of side $8 \mathrm{cm}$.

Find the perimeter of 

a regular octagon of side $4.5 \mathrm{cm}$.
 

If the perimeter of a regular decagon of side$3.6 \mathrm{cm}$ is $k \mathrm{cm}$, then find the value of $k$.

Find the perimeter of the following figure:

Find the perimeter of the following figure:

Find the perimeter of the following figure: