 # RS Aggarwal Solutions Class 9 Mathematics Solutions for Volume And Surface Area Of Solids Exercise 15C in Chapter 15 - Volume And Surface Area Of Solids

Question 10 Volume And Surface Area Of Solids Exercise 15C

A conical pit of diameter 3.5m is 12m deep. What is its capacity in kilolitres?

It is given that

The diameter of the conical pit = 3.5m

Radius of the conical pit = 3.5/2 = 1.75m

Depth of the conical pit = 12m

We know that

The volume of the conical pit = 1/3 πr2h

By substituting the values

The volume of the conical pit = 1/3 × (22/7) × 1.752 × 12

On further calculation

Volume of the conical pit = 38.5 m3 = 38.5 kilolitres

Therefore, the capacity of the conical pit is 38.5 kilolitres.

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