Question

the height of a cone is 30cm and its volume is 3140cm^3. taking (pie) as=3.14 find i) the radius of the base 2)area of the base

Answer 1

Answer:

1. volume of the cone= 1/3 pi r^2 h
2. 1/3 pi .(r)^2 ×30= 3140

=r^2=(3140×3)/30×3.14=100

r= (100)^1/2=10 cm

Area of the base = pi .r^2= 314 cm^2

Ans r= 10 cm

Area of the base= 314 cm^2