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
waec 1991mathematics

The correct answer is D. 8cm

r= 4cm; base area = \(\pi\)r2; 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

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