The ratio of chikoos to grapefruits is 3 : 5. If 70 grapefruits are added, the ratio of chikoos to grapefruits will be 1 : 5. How many grapefruits are there?
| |
Chikoos |
Grapefruits |
| Before |
3x1 =
3 u |
5x1 =
5 u |
| Change |
|
+ 70 |
| After |
1x3 =
3 u |
5x3 =
15 u |
The number of chikoos at first and in the end remains unchanged. Make the number of chikoos at first and in the end the same. LCM of 3 and 1 is 3.
Number of grapefruits added
= 15 u - 5 u
= 10 u
10 u = 70
1 u = 70 ÷ 10 = 7
Number of grapefruits
= 5 u
= 5 x 7
= 35
Answer(s): 35
