Question

Radii of a frustum are 12 cm and 15 cm. If its height is 18 cm, then find the volume of frustum

Answer 1

It is given that,
r1=15cm
r2=12cm
h=18cm
by replacing these values in the formula of volume of Frustum, we get the answer.

vol. of frustum =1/3π[r1^2+r2^2+r1*r2] h
.
= 3294πcm^2

Answer 2

Answer:

$10352.571cm^3$

Step-by-step explanation:

Radius of frustum are 12 cm and 15 cm

r = 12 cm

R = 15 cm

Height of frustum = 18 cm

Volume of frustum = $\frac{1}{3} \times \pi \times h \times (r^2+R^2+rR)$

                             = $\frac{1}{3} \times \frac{22}{7} \times 18 \times (12^2+15^2+12 \times 15)$

                             = $10352.571cm^3$

Hence the volume of frustum is  $10352.571cm^3$