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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