Calculate the surface area of a hallow cylinder which is closed at one end, if the base radius is 3.5cm and the height 8cm.[take π = 22/7]

  • A 126.5cm2
  • B 165cm2
  • C 176cm2
  • D 214.5cm2
  • E 253.5cm2
waec 1989mathematics

The correct answer is D. 214.5cm2

since it is an open cylinder; r= 3.5cm = 7/2cm

h= 8cm;

S.A = 2πrh + πr 2

= πr(2h + r)

(16 + 3.5); 11 x 19.5 = 214.5cm2

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