The ratio of Cole's money to Billy's money is 1 : 5. If Billy has $210, how much must he give to Cole so both will have the equal amount of money?
| |
Cole |
Billy |
Total |
| Before |
1 u |
5 u |
6 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
3 u |
3 u |
6 u |
Comparing Cole and
Billy in the end |
1 |
1 |
|
Amount that Billy has at first = 5 u
5 u = 210
1 u = 210 ÷ 5 = 42
Total amount that Billy and Cole have
= 1 u + 5 u
= 6 u
Amount that each of them will have in the end
= 6 u ÷ 2
= 3 u
Amount that Billy must give to Cole
= 3 u - 1 u
= 2 u
= 2 x 42
= $84
Answer(s): $84
