Box C is 5 times as heavy as Box D. Box E is 7.86 kg heavier than Box D. The total mass of Box C and Box D is 51 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
= 5 x 1 u
= 5 u
Mass of Box E = 1 u + 7.86
Total mass of Box C and Box D
= 1 u + 5 u
= 6 u
6 u = 51
1 u = 51 ÷ 6 = 8.5
Mass of Box D
= 1 u
= 8.5 kg
(b)
Mass of Box E
= 1 u + 7.86
= 8.5 + 7.86
= 16.36 kg
Answer(s): (a) 8.5 kg; (b) 16.36 kg