Answers

2014-03-02T18:17:24+05:30
Curved surface area/Total surface area = 2πr (r + h)/2rh

=>1/3=
2πr (r + h)/2πrh
=>r=2h (after calculating)

Total surface area is 1848cm^2
=>2πr (r + h) = 1848cm^2 
=>2π x 2h x(2h+h) = 1848cm^2 (r=2h)
=>h^2=49
=>h=7 
(after calculating)

if h=7cm than r = 2x7=14cm

Volume of cylinder = 
πr^2h=(22/7) x (14)^2 x 7 = 4312cm^3 (ans)

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2014-03-02T18:24:02+05:30

cancelling  we get,
h+r =3 h
r =3h-h
r = 2h.....(1)
tsa of cylinder = 1848

putting value of r we get,


solving this we get,
h = 7
and r = 2*7 = 14
then 
volume of cylinder = 
by subtituting values and further solving it we get volume of cylinder =4312

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