Two sides of a scalene triangle measure $15 \mathrm{cm}$ and $12 \mathrm{cm}$. If the perimeter of the triangle is $40 \mathrm{cm}$, find the length of the third side.

There are $3$ ribbons each of length $240 \mathrm{cm}$. They are used to stitch along sides of three banners as shown below.

Find the length of the side of each banner.

The length and the breadth of $4$ rectangles are given below. Find their perimeters. What do you infer from the answer?

$\left(\mathrm{a}\right)$ Length $=11 \mathrm{cm};$  Breadth $=4 \mathrm{cm}$

$\left(\mathrm{b}\right)$ Length $=8 \mathrm{cm};$ Breadth $=7 \mathrm{cm}$

$\left(\mathrm{c}\right)$ Length $=14 \mathrm{cm};$Breadth $=1 \mathrm{cm}$

$\left(\mathrm{d}\right)$ Length $=10 \mathrm{cm};$ Breadth $=5 \mathrm{cm}$

Sukhram wants to fence his land with $6$ rows of wire. The length and the breadth of his land are $18.5 m$ and $9.5 m$ respectively. Find the length of the wire required.

Which costs more-fencing a rectangular field of length and breadth $18 \mathrm{m}$ and $12 \mathrm{m}$ respectively, or fencing a square field of side $30.5 \mathrm{m}$? The cost of fencing is $₹15 per m$.

Find out who walked more distance if Manju walked around a rectangular field of length and breadth $75 \mathrm{m}$ and $65 \mathrm{m}$ respectively and Deepa walked around a square field of $72 \mathrm{m}$.