The diameter of the base of a right circular cylinder is 4.2 dm and its height is 1 dm. Find the area of curved surface in cm square.
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Curved Surface Area of cylinder =2πrh
R= 4.2/2 =2.1
Explanation:- 2×22/7×2.1×1
=2×22×0.3×1
=13.2 Ans.
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