Find the total surface area of right circular cylinder made up of rectangular sheet having area 20 cm² and it's length and breadth are in ratio 3:4.
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Answer:
=> 660 sq.m
Step-by-step explanation:
=> L×B = 2πrh
=> 30×22 = 2×22/7×r×30
=>4620/1320=r
=>r=3.5cm
This C. S. A of a cylinder =
2×22/7×3.5×30
=> 660 sq.m
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