Question

A play-top is in the form of a hemisphere surmounted on a cone. The diameter of the hemisphere is $3.6cm$. The total height of the play-top is $4.2cm$. Find its total surface area.

• A. $11.88\pi {cm}^2$
• B. $1.88\pi {cm}^2$
• C. $31.88\pi {cm}^2$
• D. None of these

Answer 1

The correct option is A $11.88\pi {cm}^2$