Question

Find T.S.A OF THE FOLLOWING CYLINDER FIG 11.41 1. 14CM AND 8CM 2. 2M AND 2M

Answer 1

1.

Given

H = 14cm

R = 8cm

Formula =
$= 2\pi \: {r}^{2} (r \: + h) \\ = 2 \times \frac{22}{7} \times (8 + 14) \\ = \frac{44}{7} \times 22 \\ = \frac{968}{7} \\ = 138.30$
2.

H =2.2m

R =2m

Therefore TSA

$= 2 \times \frac{22}{7} \: \times (2.2 + 2) \\ = \: \frac{44}{7} \times 4.2 \\ = \frac{184.8}{7} \\ = 26.4cm$
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