Crate M is 4 times as heavy as Crate N. Crate P is 7.25 kg heavier than Crate N. The total mass of Crate M and Crate N is 68 kg.
- What is the mass of Crate N?
- What is the mass of Crate P?
(a)
Mass of Crate N = 1 u
Mass of Crate M
= 4 x 1 u
= 4 u
Mass of Crate P = 1 u + 7.25
Total mass of Crate M and Crate N
= 1 u + 4 u
= 5 u
5 u = 68
1 u = 68 ÷ 5 = 13.6
Mass of Crate N
= 1 u
= 13.6 kg
(b)
Mass of Crate P
= 1 u + 7.25
= 13.6 + 7.25
= 20.85 kg
Answer(s): (a) 13.6 kg; (b) 20.85 kg