Question

If the curved surface of a cylinder is 96.8 sq.cm and its height is 5.5 cm then find its total area​

Answer 1

Answer:

$csa \: of \: cylinder \: = 2\pi \: rh \\ \frac{968}{10} = 2 \times \frac{22}{7} \times r \times \frac{55}{10} \\ \frac{968 \times 7}{22 \times 55 \times 2} = r \\ \\ 2.8 \: cm = r \\ tsa \: of \: cylinder \: = 2\pi \: r(h + r) \\ = 2 \times \frac{22}{7} \times \frac{28}{10} ( \frac{55}{10} + \frac{28}{10} ) \\ = 146.08 \: {cm}^{2}$