Question

the lateral or covered surface area of a closed cylindrical petrol storage tank is 4.2 m is diameter and 4.5 m high​

Answer 1

Answer:

Diameter=4.2

radius= 2.1

c.s.a of cylinder= 2πrh

2*22/7*2.1*4.5

59.4m is the answer of this question.

Answer 2

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Given,

Diameter = 4.2 m

Radius = r = 2.1 m

Height = h = 4.5m

We know,

C.S.A = 2πrh

C.S.A = 22 * 2.1 * 2 * 4.5 / 7

= 59.4 m²

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