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primary 5 | Maths
| Rate & Ratio
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Can someone help me with the math sum
Date Posted: 4 years ago
Views: 262
Since S and J have the same amount of money if S lends $5 to J, it follows that S must have $10 more than J at first.
If S lends $17 to J, S will have $17 less than before while J will have $17 more than before. The total money change is $34. As a result, now S has $24 less than J. This corresponds to a ratio 4:7.
3 units —> $24
1 unit —> 24 / 3 = 8
4 units —> 8 x 4 = $32
So S has $32 after the $17 transfer.
S has $49 now (and J has $39 now).
If S lends $17 to J, S will have $17 less than before while J will have $17 more than before. The total money change is $34. As a result, now S has $24 less than J. This corresponds to a ratio 4:7.
3 units —> $24
1 unit —> 24 / 3 = 8
4 units —> 8 x 4 = $32
So S has $32 after the $17 transfer.
S has $49 now (and J has $39 now).
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