Box C is 3 times as heavy as Box D. Box E is 7.74 kg heavier than Box D. The total mass of Box C and Box D is 70 kg.
- What is the mass of Box D?
- What is the mass of Box E?
(a)
Mass of Box D = 1 u
Mass of Box C
= 3 x 1 u
= 3 u
Mass of Box E = 1 u + 7.74
Total mass of Box C and Box D
= 1 u + 3 u
= 4 u
4 u = 70
1 u = 70 ÷ 4 = 17.5
Mass of Box D
= 1 u
= 17.5 kg
(b)
Mass of Box E
= 1 u + 7.74
= 17.5 + 7.74
= 25.24 kg
Answer(s): (a) 17.5 kg; (b) 25.24 kg