The radius of a hemisphere is 2.1 cm. What will be its volume?

a) 24.6 cm³
b) 15.7 cm³
c) 19.4 cm³
d) 17.6 cm³

Ans : c) 19.4 cm³

(SSC Constable GD Exam previous paper- Maths)

Solution :

To calculate the volume of a hemisphere, we use the formula:

Volume of hemisphere =

Where:

• pi is approx 3.1416
• (r) is the radius of the hemisphere, which is given as 2.1 cm.

Now, substituting the values into the formula:

So, the volume of the hemisphere is 19.40 cm³.