Q13 of 70 Page 19

The ratio between the radius of the base and the height of a cylinder is 2 : 3. Find the total surface area of the cylinder, it its volume is 1617 cm3.


Given,


=


Volume of cylinder = 1617 cm3


Let radius = 2x cm and height = 3x cm


So, volume of cylinder = πr2h =


=


= x =


Radius of cylinder = 2x = 2×3.5 = 7 cm


Height of cylinder = 3x = 3×3.5 = 10.5 cm


Hence , total surface area of cylinder = 2πr(h+r) =


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