Question

Find the height of a cylinder whose radius is 7 cm and the total surface area is 968 sq.cm ?
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Answer 1

Answer:

Hope, this answer helps you

Answer 2

Answer:

the height of the cylinder is 15 cm.

Step-by-step explanation:

Let the height of the cylinder be h cm.

it is given that

r = Radius of the cylinder = 7 cm

We have,

Total surface area = 968 sq.cm

$⟹ \: 2πr \: (h + r) \: = 986 \: sq.cm \\ \\ ⟹ \: 2 \times \frac{22}{7} \times 7 \times (h + 7) = \:986 \\ \\ ⟹ \: 44 \: \times (h + 7) \: = 986 \\ \\ ⟹ \: h + 7 = \frac{986}{44} \\ \\ ⟹ \: h + 7 = 22 \\ \\ ⟹ \: h = 15$

Hence, the height of the cylinder is 15 cm.