Question

The height and area of the base a cone are 9cm and 1386 respectively .Find the volume of a cone.

Answer 1

Answer:

The ans is 4158 cm³

Step-by-step explanation:

πr² = 1386

r² = 1386 x 7/22

r² = 63 x 7

r = √(441)

r = 21 cm

vol of cone = 1/3πr²h

                   =1/3 x 22/7 x 21 x 21 x 9

                   = 1/3 x 22 x 3 x 21 x 9

                   = 22 x 21 x 9

                   = 4158 cm³

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