H K Dass, Rama Verma and, Bhagwat Swarup Sharma Solutions for Chapter: Area Related To Circle, Exercise 1: EXERCISE

Pooja has a bicycle whose wheel makes $5000$ revolutions in moving $11 \mathrm{km}$. Find the diameter of the wheel.

Gyan has a car whose wheels are $60 \mathrm{cm}$ in diameter. How many complete revolution does each wheel make in $15$ minutes when the car is travelling at a speed of $60 \mathrm{km}/\mathrm{hr}$. (Write only whole number)

A bucket full of water is raised from a well by means of a rope which is wound around a pulley of diameter $77 \mathrm{cm}.$ Bucket takes $1$ minute $28$ seconds to ascend at a uniform speed of $1.1 \mathrm{m}/\sec$. Find the number of revolutions that the pulley makes in raising the bucket considering $\mathrm{\pi }=\frac{22}{7}$.

The circumference of the Chakra of National flag exceeds its diameter by $16.8 \mathrm{cm}$. If the radius of the chakra is $k \mathrm{cm}$, then find $k$. $($Take $\mathrm{\pi }=\frac{22}{7})$(Write the answer in decimals)

A wire made of silver is in the form of nose ring of radius $42 \mathrm{mm}$. It is bent into a square. If the side of the square is $k \mathrm{mm}$, then find the value of $k$.

Gurdeep made a bangle of silver wire, of diameter $35 \mathrm{mm}$. It is rebent into a square form. If the length of the side of the square is $k \mathrm{mm}$, then find the value of $k$ considering $\mathrm{\pi }=\frac{22}{7}$.

Aman has a tractor. The sum of radii of two wheels of the tractor is $98 \mathrm{cm}$ and the difference of their circumferences is $176 \mathrm{cm}.$ Find the diameter of the wheels.

Rishabh has a motorcycle with wheels of diameter $91 \mathrm{cm}.$There are $22$ spokes in the wheel. If the length of the arc between two adjoining spokes is $k \mathrm{cm}$, then find the value of $k$ considering $\mathrm{\pi }=\frac{22}{7}$.