Question

Cylinder

1. The height of a right circular solid cylinder is equal to its diameter then ratio of curved surface area to the total surface area

3:2

2:3

1:1

5:7


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Answer 1

Answer:

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Answer 2

Answer:

We know, curved surface area of a cylinder of radius "R" and height "h" =2πRh

Total surface area of a cylinder of radius "r" and height "h" =2πr(r+h)

Given, 2πRh=

3

1

×2πr(r+h)

∴h=

3

1

×(r+h)

∴

3

2

h=

3

1

r

∴h=

2

1

r