Question

please tell me question no. 5

Answer 1

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Answer 2

HEY MATE HERE IS YOUR ANSWER

Answer:

539cm^3

Step-by-step explanation:

Let r be the radius of the base and h be the height of the cylinder.Then,

Total surface area = 2πr(r+h) cm^2 , Curved surface area = 2πrh cm^2

We have,

Curved surface area = 1/3(Total surface area) = 1/3 x 462 cm^2  

2πrh = 154 cm^2.....(i)

AGAIN,      Total surface area = 462cm^2

2πrh + 2πr^2 = 462

154 + 2πr^2 = 462

2 x 22/7 x r^2  = 462-154..................r^2 = 49, r=7

From (i). we have

2 x 22/7 x 7 x h = 154.....   h=7/2

Hence, Volume of the cylinder = πr^2h = 22/7 x 7^2 x 7/2cm^3 = 539cm^3

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