Question

the area of the base of a right circular cone is 7.85 m square find its volume if its height is 12 CM​

Answer 1

here is the answer.......

Answer 2

Since it's base area is 7.85 m²

So , πr² = 7.85/100

=} 22/7 x r² = 7.85/100

=} r² = 7.85x7/22/100

=} r² = 0.025 (approx)

So r = √0.025 = 0.16 cm (approx)

So it's Volume = 1/3πr²h

=} 1/3x22/7x0.16x0.16x12

=} 6.7584/21

=} 0.32 cm³