Question

The area of the base of a right circular cylinder is 81pai . If its height is 14 cm , find the curved surface of the cylender

Answer 1

◆●◆●◆step by step explanation◆●◆●◆●◆

Area of base(circle)=π${r}^{2}$

81π=π${r}^{2}$

(π=π cancel out)

81=${r}^{2}$

√81=r

radius=9cm

Surface area of cylinder=2×π×radius×height

Surface area of cylinder=$2×{22}÷{7}×9×14$

surface area=2×22×9×2

Surface area of cylinder=792${cm}^{2}$

【】【】Hope you have understood【】【】