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Question

In a circus, a motorcyclist performs his stunts in a death-well which is in the form of a hollow cylinder. The thickness of the cylinder is negligible. If the diameter of the hollow cylinder is 14 m, and height is 20 m, then find the area available for the motorcyclist to perform stunts. (Take π=227)


  1. 616m2

  2. 516m2

  3. 486m2

  4. 586m2


Solution

The correct option is A

616m2


Given, height of the cylinder = 20 m 
Radius of the cylinder  =diameter2=142=7 m

Area available to the motorcyclist = Curved surface area of the cylinder
=2πrh
=2×227×7×20

=880 m2

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