Box X is 3 times as heavy as Box Y. Box Z is 6.99 kg heavier than Box Y. The total mass of Box X and Box Y is 78 kg.
- What is the mass of Box Y?
- What is the mass of Box Z?
(a)
Mass of Box Y = 1 u
Mass of Box X
= 3 x 1 u
= 3 u
Mass of Box Z = 1 u + 6.99
Total mass of Box X and Box Y
= 1 u + 3 u
= 4 u
4 u = 78
1 u = 78 ÷ 4 = 19.5
Mass of Box Y
= 1 u
= 19.5 kg
(b)
Mass of Box Z
= 1 u + 6.99
= 19.5 + 6.99
= 26.49 kg
Answer(s): (a) 19.5 kg; (b) 26.49 kg