Find the total surface area of a right circular cylinder whose radius is 7 cm and height is 12 cm. Use $\pi =\frac{22}{7}$.

Step-by-step solution

1. Compute the area of the two circular bases: $2\pi r^2$. $2\times \frac{22}{7}\times 7^2=2\times \frac{22}{7}\times 49=308{\text{ cm}}^2$.
2. Compute the lateral surface area: $2\pi rh$. $2\times \frac{22}{7}\times 7\times 12=2\times 22\times 12=528{\text{ cm}}^2$.
3. Add the two parts to get the total surface area. $308+528=836{\text{ cm}}^2$.

Concept tested: total surface area of cylinder

Published 13 October 2026 · How this solution was prepared and checked