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What length of 5m wide cloth will be required to make a conical tent, the radius of whose base is 7m and whose height is 24m or Prove that the angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle ?
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Step-by-step explanation:
r=7m,h=24m,l=?
l2=r2+h2=72+242=49+576=625
∴l=625=25m
Area of canvas used=CSA of conical tent
∴ CSA of a cone=πrl=722×7m×25m=550m2
Area of canvas=550m2
Length× width=550m2
∴ length=width550m2=5550m2=110m
∴ Length of canvas used=110m.
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