# A solid cylinder has total surface area of 1386sq cm . its curved surface area is on ninth of its total surface area . find the radius and height of the cylinder

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by prituldave

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by prituldave

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The Brainliest Answer!

TSA=2(pi)r(h+r)

butgiven,

csa=1/9(tsa)

=1/9(1386)

=154 sq.cm

also,

tsa=CSA+2(pi)r^2

1386=154+2*22/7*r^2

1232=44/7*r^2

r^2=196

r=14...

csa=2(pi)rh=154

2*22/7*14*h=154

h=7/4...

therefore,

radius=14 cm and

height=7/4cm=1.75 cm...

I hope it's correct....!!