The ratio of guavas to starfruits is 3 : 8. If 10 starfruits are added, the ratio of guavas to starfruits will be 2 : 7. How many starfruits are there?
| |
Guavas |
Starfruits |
| Before |
3x2 =
6 u |
8x2 =
16 u |
| Change |
|
+ 10 |
| After |
2x3 =
6 u |
7x3 =
21 u |
The number of guavas at first and in the end remains unchanged. Make the number of guavas at first and in the end the same. LCM of 3 and 2 is 6.
Number of starfruits added
= 21 u - 16 u
= 5 u
5 u = 10
1 u = 10 ÷ 5 = 2
Number of starfruits
= 16 u
= 16 x 2
= 32
Answer(s): 32
