Box B is 4 times as heavy as Box C. Box D is 7.94 kg heavier than Box C. The total mass of Box B and Box C is 42 kg.
- What is the mass of Box C?
- What is the mass of Box D?
(a)
Mass of Box C = 1 u
Mass of Box B
= 4 x 1 u
= 4 u
Mass of Box D = 1 u + 7.94
Total mass of Box B and Box C
= 1 u + 4 u
= 5 u
5 u = 42
1 u = 42 ÷ 5 = 8.4
Mass of Box C
= 1 u
= 8.4 kg
(b)
Mass of Box D
= 1 u + 7.94
= 8.4 + 7.94
= 16.34 kg
Answer(s): (a) 8.4 kg; (b) 16.34 kg