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Question

 The solid object is composed of a hemisphere and a cone surmounted on it. If the common radius is 7m and height of the cone is 1m, what is the volume?


  1. 262.39  m2

  2. 770m3

  3. 662.39  m2

  4. 563  m2


Solution

The correct option is B

770m3


Volume of the surface = Volume of the hemisphere + Volume of the cone 
V= 23πr3+ 13πr2h

π=227;r=7m;h=1m
V=(23×227×7×7×7+13×227×7×7×1)m3=770m3
770m3

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