In it please solve Q9B
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d=4.2cm
therefore, r=2.1cm
r is same for all the three solids
Volume of solid= V of cylinder+ V of hemisphere + V of cone
= pi r^2 h +1/3 pi r^2h+2/3 pi r^3
=pi r^2(h+H/3+r)
=13.86(12+7/3+2.1)
=13.86(45.1/3) (taking LCM)
=625.086/3
=208.362 CM^2
therefore, r=2.1cm
r is same for all the three solids
Volume of solid= V of cylinder+ V of hemisphere + V of cone
= pi r^2 h +1/3 pi r^2h+2/3 pi r^3
=pi r^2(h+H/3+r)
=13.86(12+7/3+2.1)
=13.86(45.1/3) (taking LCM)
=625.086/3
=208.362 CM^2
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