Question

How would we be able to use conversions to solve this problem?

Answer 1

It tells you that 1000g are in 1 kg. All you need to do is convert your 15 kg to 15000 g.

Answer 2

Explanation:

1 kg = 1000 g

15 Kg = 15 *1000 = 15000 g

7.75 g = 1 cm³

1 g = 1 ÷ 7.75 cm³

15000 g =
`(1)/(7.75)*15000 = 1935.48`

= 1935 cm³

Inner diameter = 6 cm

Inner radius = r = 6/2 = 3 cm

Outer radius = R = inner radius + thickness

R = 3 + 2 = 5 cm

Volume of cylindrical pipe = 1935 cm³

`\pi h*(R +r)(R - r) = 1935\\\\3.14 * h *( 5 + 3)(5 - 3) = 1935 \\\\3.14 * h * 8 *2=1935\\\\h = (1935)/(3.14*8*2)\\\\h = 38.52 = 39`

h = 39 cm