find the height of cylinder whise radius is 7 cm and total surface area is 168 cm sq
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find the height of cylinder whise radius is 7 cm and total surface area is 168 cm sq
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let the height be x
t.s.a =2π r(r+H)
2*22\7*7(7+x)=168
44*7+H= 168
308+H=168
h=168\308
h= 1.83