M L Aggarwal Solutions for Exercise 3: EXERCISE 16.3

If the area of semi-circular region is 77cm², find its perimeter.

In the figure given below, $AC \text{and} BD$ are two perpendicular diameters of a circle $ABCD$. Given that the area of the shaded portion is $308 {\mathrm{cm}}^2$

 calculate : (i) the length of AC and (ii) the circumference of the circle.

In the figure given below, $AC \text{and} BD$ are two perpendicular diameters of a circle with centre O. if $AC$is $16 \mathrm{cm}$, Calculate the area and perimeter of the shaded part. (take $\mathrm{\pi }=3.14$)

A bucket is raised from a well by means of a rope which is wound round a wheel of diameter $77 \mathrm{cm}$. Given that the bucket ascends in $1$ minute $28$ seconds with a uniform speed of $1.1 \mathrm{m}/\sec$, calculate the number of complete revolution the wheels makes in raising the bucket .

The wheel of a cart is making $5$ revolution per second. If the diameter of the wheel is $84 \mathrm{cm}$, find its speed in $km/h$. Give your answer, correct to the nearest $km$.

The circumference of a circle is 123.2cm. calculate :

The circumference of a circle is $123.2 \mathrm{cm}$. Calculate :

The circumference of a circle is $123.2 \mathrm{cm}$. Calculate :

The effect on the area of the circle if the radius is doubled.