Question

a reservoir in the shape of a right circular cylinder is to contain 79,200 L of water. if the radius of the cylinder is 3 m, find its height.

Answer 1

Answer:

1000L=1cubic metre

:.79200L=?

=79200/1000

=79.2cubic metre

volume of right circular cylinder=■(pi)r×r×h

:.79.2 =22/7×3×3×h

:79.2×7/22×3×3=h

:.h=2.8 metre

Answer 2

Answer: 2.8

Step-by-step explanation:

1000 L = 1 cubic metre

79200 L = 79200÷1000

              = 79.2 cubic metre

Volume of cylinder = πr²h

                79.2         = π × r × r × h

                79.2         = 22÷7 × 3×3 × h

                 79.2        = 198 ÷ 7 × h

                    h           = 79.2 × 7 ÷ 198

                    h            = 564.4 ÷ 198

                    h           =  2.8