Question

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

Answer 1

Here we are given that the diameter of the conical pit is 3.5 m and its depth is 12 m.

Therefore, radius = 3.5 /2

                             = 1.75 m

W have to find the capacity in kilolitres

First, we will use the formula of volume of the cone

Volume of cone = πr²h / 3

Putting the values

Volume = $\frac{22}{7} \times (1.75)^{2} \times12\times\frac{1}{3}$

            = 38.5

            = 38.5 m³

Now, we should know that 1 m³ = 1 kilolitre

Therefore, the capacity of the conical pit will be 38.5 kilolitre

Answer 2

Answer:

Step-by-step explanation:

VOLUME OF CONE-$1/3\pi R^{2} H$

HERE DIAMETER=3.5M

RADIUS=3.5/2=1.75M

HEIGHT=12M

PUT IN FORMULA,

1/3$\pi$$1.75^{2}$12

3.06$\pi$4

12.24$\pi$

we know pi can be written as 3.14

12.24×3.14

38.4m^3

1m^3=1000Litres

38.4*1000=38400litres

1Kl=1000litres

1Litres =1/1000Kl

=38400/1000

=38.4 Kilolitres