Question

9. The surface area of a cylinder is 94.2 cm2. The radius is 2 cm. What is the height? Round

your answer to the nearest tenth. (2 marks)
please answer asap:)

Answer 1

5.6cm

Explanation:

The surface area of cylinder = 2*pi*r(r+h)

Given:-S.A=94.2 cm Sq.

Radius r=2cm

Put all valve into formulas and calculate

(r+h) =S. A/2*pi.r

= 94.2/2*3.14*2

=~7.6 cm

(r+h) =7.6

Or h= 7.6-r

Or h= 7.6-2

Or h=5.6 cm