Question

A cylinder has a diameter of 20 cm . The curved surface area is 100cm2 . Find the height of the cylinder .

Answer 1

Answer:

2pirh=100cm2

2×22

__

7 ×10×h=100

=h=100×7

22×10×2=35

___

22

h=1.6 cmp

Answer 2

Answer:

Curved surface area of cylinder=2πrh

Diameter=20cm

So, Radius (r)=10cm

CSA=100cm^2

Now insert the values in the formula:

$2\pi \times r \times h = csa \\ 2 \times 22 \div 7 \times 10 \times h = 100 \\ 22 \div 7 \times 10 \times h = 100 \div 2 \\ 22 \times 10 \times h = 50 \times 7 \\ 220 \times h = 350 \\ h = 350 \div 220 \\ h = 35 \div 22$

Therefore, height of the cylinder is 35/22cm

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