The curved surface area of a cylinder is 
and its diameter is 20 cm. Find its height and volume.
Given,
Curved surface area of cylinder = 1210 cm2
Diameter of cylinder = 20 cm
Radius of cylinder = 
= 10 cm
Let height of cylinder = h cm
Curved surface area = 2πrh
= 2πrh = 1210
= 2 × 
× 10 × h = 1210
= h = 
19.25 cm
∴ Volume of cylinder = πr2h = 
× 10 × 10 × 19.25 = 6050 cm3
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