Ben had kiwis and mangoes. The ratio of kiwis to mangoes was 7 : 2. After
34 of the kiwis and 70 mangoes were sold, there were 7 times as many kiwis as mangoes left. How many kiwis and mangoes were there at first?
|
Kiwis |
Mangoes |
Comparing kiwis and mangoes at first |
7x4 = 28 u |
2x4 = 8 u |
Before |
4x7 = 28 u |
|
Change |
- 3x7 = - 21 u |
- 70 |
After |
1x7 = 7 u |
|
Comparing kiwis and mangoes in the end |
7 u |
1 u |
The number of kiwis at first is repeated. Make the number of kiwis at first the same. LCM of 7 and 4 is 28.
Number of mangoes sold
= 8 u - 1 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Number of kiwis and mangoes at first
= 28 u + 8 u
= 36 u
= 36 x 10
= 360
Answer(s): 360