Question

a closed cyclindrical brick tank has a diameter of 3.5m & height 8m what is the capacity of the tank

Answer 1

Diameter of tank = 7/2 m 
So, Radius of tank, r = 7/4 m
And height, h = 8 m

So, Capacity of tank = Vol. of tank

            = πr²*h
            = 22/7 * 49/16 * 8
            = 22*7*/2
            = 154/2 m² = 77 m³
                         

Answer 2

it helpful for you
formula of volume of cylinder is pie r square h