Find the length of paper whose width is 11 cm is required to cover only the curved surface of cylinder diameter 10.5 cm and length 20 cm . *
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Step-by-step explanation:
C.S.A = 2 × 22/7 × 10.5/2 × 20 sq. cm = 660 sq. cm
Now, width of paper = 11 cm
Area of paper = 660 sq. cm
Length of paper = 660÷11 cm = 60 cm
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