S K Khanuja Solutions for Chapter: Concept of Perimeter and Area, Exercise 3: Exercise

The area of a rectangle whose length and breadth are $45 \mathrm{cm}$ and $16 \mathrm{cm}$ is $k {\mathrm{cm}}^2$, find $k$.

If the area of a square whose sides are $14 \mathrm{cm}$ long is $k {\mathrm{cm}}^2$, then find $k$.

A carpet is $30 \mathrm{m} 75 \mathrm{cm}$ long and $8 \mathrm{m}$ wide. Find its cost at $₹20$ per square metre.

A lane, $150 \mathrm{m}$ long and $9 \mathrm{m}$ wide, is to be paved with bricks, each measuring $22.5 \mathrm{cm}$ by $7.5 \mathrm{cm}$. Find the number of bricks required.

The length and breadth of a rectangular park are in the ratio $5:3$ and its perimeter is $128 \mathrm{m}$. Find the area of the park.

Calculate the area of the shaded region given below:

Calculate the area of the shaded region given below:

Calculate the area of the shaded region given below: