Question

A cylinder with radius 3.5cm has

its two ends closed. If the total surface
area is 209 cm² , Calculate the height
of the cylinder (x=22/7)​

Answer 1

h = 6 cm

Explanation:

`A=2\pi rh+2\pi r^2`

Given that surface area = 209 cm ², Radius = 3.5 cm

209 = 2(3.14)(3.5)h+2(3.14)(3.5)²

209 = 22h + 76.97

22 h = 209-76.97

22h = 132

Dividing both sides by 22, we get

h = 6 cm