a cylinder has radius 4.2 cm and height 30 cm find the surface area of the cylinder if it is (a) open at both ends
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Answer:
If cylinder is open at both end then we find curved surface area.
Step-by-step explanation:
r=4.2 cm, h=30 cm
Curved surface area of cylinder = 2πrh
= 2* 22/7 * 4.2 * 30
= 792 cm^2
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