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
- A.
1cm - B.
2cm - C.
4cm - D.
8cm - E.
16cm
Correct Answer: Option D
Explanation
r= 4cm; base area = (pi)r^{2}; Curve S.A = 2(pi)rh
(frac{base area}{curved area}) = 1/4; (pi)/2(pi)rh
=h = (frac{4 x 4cm}{2})
h= 8cm