Then Its Volume Is;

The height of a right circular cylinder is 21 cm. Its curved surface area is 924 sq cm. Then its volume is;

  1. 1859 cu. cm
  2. 1586 cu. cm
  3. 3234 cu. cm
  4. None of these
Monis Rasool Professor Asked on 25th July 2015 in Maths.
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  • 1 Answer(s)

    Answer: (3). 3234 cu. Cm

    Given: Height of right circular cylinder is 21 cm.

    C.S.A of cylinder is 924 sq. cm.

    C.S.A of cylinder = 2πRH

    2πRH = 924

    R = (924×7) ÷ (2x22x21)

    R = 6468 ÷ 924

    R = 7 cm.

    Now, we have to find Vol. of cylinder

    Vol. of cylinder = πR2H

    Vol. of cylinder = (22x7x7x21) ÷7

    Vol. of cylinder = 3234 cu. Cm.

     

    vijay Professor Answered on 25th July 2015.
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