The height of a right circular cylinder is 10.5 m  . Three times the sum of the areas of its two circular faces is twice the area of the curved surface. What is the volume of the cylinder?

# The height of a right circular cylinder is  . Three times the sum of the areas of its two circular faces is twice the area of the curved surface. What is the volume of the cylinder?

1. A

2. B

3. C

4. D

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### Solution:

Given the height of cylinder =10.5m and three times the sum of the areas of its two circular faces is twice the area of the curved surface.
So,
Put the value of h in the above equation.

So, radius of the cylinder (r)=7m.
Now, the volume of the cylinder is,
Thus, the volume of the cylinder is  .
Therefore, option 3 is correct.

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