Choose the correct alternative answer for each of the following q… - Vidyadip

MCQ

Choose the correct alternative answer for each of the following question.
The curved surface area of a cylinder is $440 \mathrm{~cm}^2$ and its radius is $5 \ cm.$ Find its height.

✓
$44 / \pi \mathrm{cm}$
B
$22 \pi \mathrm{cm}$
C
$44 \pi \mathrm{cm}$
D
$22 / \pi \mathrm{cm}$

✓

Answer

Correct option: A.

$44 / \pi \mathrm{cm}$

Radius of cylinder, $r=5 \mathrm{~cm}$
Height of cylinder $=h$
Curved Surface Area of cylinder, $A=440 \mathrm{~cm}^2=2 \pi \mathrm{rh}$
$440=2 \times \pi \times 5 \times h$
$\Rightarrow h=\frac{44}{\pi}$
$\therefore$ Option $(A)$ is correct.

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