Question

A cylindrical tank 7m in diameter contains water to a depth of 4m .fi d the total area of the wet surface .( pie=3.14)

Answer 1

Find the radius:

Radius = Diameter ÷ 2

Radius = 7 ÷ 2 = 3.5 m

Find the surface area:

Surface area = πr² + 2πrh

Surface area = 3.14 x (3.5)² + 2 (3.14)(3.5)(4)

Surface area = 38.465 + 87.92

Surface area = 126.385 m²

Answer: The surface area is 126.385 m²