Question

The radius of the base of a cylindrical water drum open at the top is 35 cm and height is 1.3 m . Find the inner surface area of the water drum?

Answer 1

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Answer 2

Answer:

The inner surface area of the water drum is 3.242 meter square.

Step-by-step explanation:

Given : The radius of the base of a cylindrical water drum open at the top is 35 cm and height is 1.3 m.

To find : The inner surface area of the water drum?

Solution :

The inner surface area of the water drum,

$S=\pi r(2h+r)$

Height h=1.3 m, radius r=35 cm=0.35 m

$S=(3.14)(0.35)(2(1.3)+0.35)$

$S=(3.14)(0.35)(2.95)$

$S=3.242 m^2$

The inner surface area of the water drum is 3.242 meter square.