Question

please help me please​

Answer 1

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Height of the Cylindrical tank

$⇒h = 1 \: m$

Redius of the Cylindrical tank

$⇒r = \frac{140}{2} = 70cm = 0.7m(1m = 100cm)$

∴ Area of the metal sheet required to make the cylindrical tank.

$= Total \: Surface \: area \: of \: the \: Cylindrical \: tank$

$= 2\pi(r + h)$

$= 2 \times \frac{22}{7} \times 0.7 \times (0.7 + 1)$

$= 2 \times \frac{22}{7} \times 0.7 \times 1.7$

$= 7.48 {m}^{2}$

Thus the area of metal sheet required to make the cylindrical tank is 7.48m²

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