A cylinder of base radius 4cm is open at one end . If the...
A cylinder of base radius 4cm is open at one end . If the ratio of the area of its base to that of its curved surface is 1:4, calculate the height of the cylinder
1cm
2cm
4cm
8cm
16cm
Correct answer is D
r= 4cm; base area = πr2; Curve S.A = 2πrh
baseareacurvedarea = 1/4; π/2πrh
=h = 4x4cm2
h= 8cm
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