Answers

2014-03-01T11:12:31+05:30
Radius (R) of the upper circular= 4 cm
Radius (r) of the lower circular = 10 cm

so, according to the formula =
π(R+r)l + πr^2 =   π(10 + 4) 15 + π(4)2= π(14) 15 + 16π
                                                                 = 210π + 16π = (266x22)/7= 710.28cm^2
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2014-03-01T11:28:59+05:30

=22/7*(10+4)15+22/7*4*4
=352*2*15+352/7
=660+352/7
=660+50.28
=710.28
plz refer to RD sharma page no. 16.75
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