Question

There is a coin. Ram attaches a conical attachment to one flat end of coin. The conical attachment has same radius as coin. What is the surface area of the combined solid?

• A. Coin C.S.A
• B. Coin base area
• C. cone C.S.A
• D. Total surface area of cone

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Coin C.S.A

B

Coin base area

C

cone C.S.A

This leaves only the following surfaces for the combined solid-

1. One flat surface of coin

2. Curved surface of coin

3. Curved surface area of cone

These 3 areas add up together to give total surface area of combined solid.