Question

The height of a circular cylinder is 20 cm and the radius of its base is 7 cm. Find:
(i) the volume
(ii) the total surface area

Answer 1

Answer:

Answer in the given attachment.

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Answer 2

Answer:

Volume of the

$volume \: of \: a \: cylinder \: = \pi \: r {}^{2} h \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{22}{7} \times 7 \times 7 \times 20 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 3080cm {}^{3} \\ total \: surface \: area \: f \: a \: cylinder \: \\ = 2\pi \: r(r + h) \\ = 2 \times \frac{22}{7} \times 7(7 + 20) \\ = 44(7 + 20) \\ = 44 \times 27 \\ = 1188cm {}^{2}$