Find the curved surface area of a cylinder diameter 20cm and length 10cm.
- 400 cm^2
- 628 cm^2
- 200 cm^2
Explanation
The curved (lateral) surface area of a cylinder is pi * diameter * length, equivalent to 2*pi*r*length. Here that is pi * 20 * 10, which is about 628 square centimetres. The 200 and 400 answers omit the factor of pi.
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Community Comments (3)
D
dimky Posts: 514 24.05.2012 / 10:32
20 * 3.14 * 10 = 628
A
ANDYSQUIZ Posts: 3 03.09.2020 / 09:58
shouldnt it be pi*radius*lenght? 10*3.14*10 ??
E
Elia Posts: 2 05.02.2026 / 15:15
Surface area of cylinder is equal to circumference moltiply by height. So C=2*pi*r=d*pi and eight is h, so Surface=2*pi*r*h=d*pi*h=20*3.14*10=628
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