Question

If the radius of a coin is 3cm then calculate its surface area

Answer 1

$a \: coin \: is \: cylindrical \: in \: shape \: so \: the \: surface \: area \: is \\ 2\pi r(r + h) \\ 2 \times \frac{22}{7} \times 3(3 + h) \\ \frac{44}{7} \times 9 + 3h \\ 56.57 + 3h \: {cm}^{2}$

Answer 2

Answer:

56.57+cmsquare

Explanation: