The volume of a cylinder of radius 14cm is 210cm3. What is the curved surface area of the cylinder?
\(V = \pi r^2 h\)
210 = \(\frac{22}{7} \times 14^2 \times\) h
h = \(\frac{210}{22 \times 28}\)
Curved surface area = 2\(\pi\) rh
= 2 \(\times \frac{22}{7} \times 14 \times \frac{210}{22 \times 26} = 30cm^2\)
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