Ivory is 30% heavier than Bryan. Usha is 10% lighter than Bryan. Ivory is 20 kg heavier than Usha. What is Bryan's mass?
| Ivory |
Bryan |
Usha |
| 130% |
100% |
|
| |
100% |
90% |
| 13 u |
10 u |
9 u |
Ivory's mass compared to Bryan's mass in percent
= 100% + 30%
= 130%
Usha's mass compared to Bryan's mass in percent
= 100% - 10%
= 90%
130% =
130100 =
131090% =
90100 =
910Bryan's mass is the repeated identity. Make Bryan's mass the same.
Bryan's mass = 10 u
Mass that Ivory has more than Usha
= 13 u - 9 u
= 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Bryan's mass
= 10 u
= 10 x 5
= 50 kg
Answer(s): 50 kg
