The volume of a cylinder is 6358cm cube and its height is 28cm .Find its radius and the curved surface area.
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volume of cylinder =pie r*r*h
6358=22/7*r*r*28
6358=22*r*r*4
6358=88*r*r
6358/88=r*r
72.25=r*r
r=8.5
C. S. A=2pie*r*h
= 2*22/7*8.5*28
=2*22*8.5*4
=44*34
=1496sq.cm
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