Question

2. A cylinder has a height of 4.5 cm and a diameter of 1.5 cm. What is the surface area of the cylinder in square centimeters? Use 3.14 for pi.

21.2
31.8
7.9
24.7

Answer 1

24.7

Explanation:

took this exam and got it right

Answer 2

`SA = 24.73~cm^3`

Explanation:

`SA = 2\pi r^2 + 2\pi r h`

r = d/2 = (1.5 cm)/2 = 0.75 cm

`SA = 2(3.14)(0.75~cm)^2 + 2(3.14)(0.75~cm)(4.5~cm)`

`SA = 24.73~cm^3`