At a stall, the ratio of lemons to coconuts was 3 : 10. After Tina bought three-fifths of the coconuts, there was a total of 42 lemons and coconuts left at the stall. How many fruits were there at first?
| |
Lemons |
Coconuts |
Total |
Comparing lemons
and coconuts at first |
3x1 =
3 u |
10x1 =
10 u |
13 u |
Before |
|
5x2 =
10 u |
|
Change |
|
- 3x2 =
- 6 u |
|
After |
3 u |
2x2 =
4 u |
42 |
The number of coconuts at first is repeated. Make the number of coconuts at first the same. LCM of 10 and 5 is 10.
Total number of fruits left
= 3 u + 4 u
= 7 u
7 u = 42
1 u = 42 ÷ 7 = 6
Number of fruits at first
= 3 u + 10 u
= 13 u
= 13 x 6
= 78
Answer(s): 78
