Sir why? we plus the curved surface area of two hemisphere to curved s

This question was asked in Ex 13.1, 9

Sir why? we plus the curved surface area of two hemisphere to curved surface of cylindrical part. But they are subtracted why? we added.
in 13.1,9

fact man

Dec. 11, 2017, 10 a.m.

Answers!

Davneet Singh

Dec. 11, 2017, 10:02 a.m.

Hello

For surface area

Imagine yourself touching the figure. What surface can you feel?

You can feel the curved part of the cylinder. The top curved part of the hemisphere and the bottom curved part of the hemisphere.

So, you can feel Curved Surface Area of Cylinder + CSA of Top Hemisphere + CSA of Bottom Hemisphere

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