Question

The total surface area of a cylinder is 325cm². If its height is 10 cm, then find the diameter of the base.

Answer 1

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➠$\textit{2πrh = 325cm}$

➠ $\textit{2× }$ $\frac{22}{7}$×r×10= 325

➠$\textit{r = 325×7/ 2×22×10}$

➠$\textit{ r = 5.17}$

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$\textit{daimeter = 2× 5.17 = 10.34 about.}$