Question

(I) the lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2m in diameter and 4.5m high​

Answer 1

${ \huge{ \pink{ \underline{ \boxed{ \bf{ \pink{Answer}}}}}}}$

$\sf \purple{Height (h) of cylindrical \: tank = 4.5}$

$\sf \purple{So, radius \: of \: the \: circular \: end =}$

$\frac{4.2}{2} = 2.1 \sf{m}$

$\sf \purple{The \: curved \: surface \: area \: of \: tank = }$

$\sf{2πrh}$

$\sf = 2 \times \frac{22}{1} \times 2.1 \times 4.5 {m}^{2} = 54.4 {m}^{2}$

$\sf \purple{TSA \: of \: the \: tank =2πr(r+h)}$

$\sf = 2 \times \frac{22}{1} \times 2.1(2.1 + 4.5)$

$\sf = 44 \times 0.3 \times 6.6$

$\sf = 87.12 {m}^{2}$

• So the answer is 87.12m²

Answer 2

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