Jharne De and Ranjana Kumar Solutions for Chapter: Perimeter and Area, Exercise 4: EXERCISE 15.3

The circumference of a circle is $88 \mathrm{cm}$. Find the area of the circle.

If the distance covered by a scooter tyre of radius $35$ $\mathrm{cm}$ in $100$ revolutions is $k \mathrm{cm}$, then find the value of $k$.

The inner and outer circumference of a circular racing track are $264 \mathrm{cm}$ and $352 \mathrm{cm}$, respectively. If the width of the racing track is $k \mathrm{cm}$, then find the value of $k$.

A wire is in the shape of a square with side $22 \mathrm{cm}$. It is bent to form a circle. If the area of the circle is $\mathrm{k} {\mathrm{cm}}^2$, the find $\mathrm{k}$.

A cardboard is in the shape of a square of side $28 \mathrm{cm}$. A circle with the biggest diameter is cut out from the square. If the remaining portion of the cardboard is $x {\mathrm{cm}}^2$, then find the value of $x$.

If the area of the region inside the rectangle excluding the triangular region is $k {\mathrm{cm}}^2$, find $k$.

Find the area of the shaded region:

Sumit is a long distance runner. He takes $11$ rounds of a circular park of radius $42$ $\mathrm{m}$. If the total distance covered by Sumit is $k \mathrm{m}$.