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primary 5 | Maths
| Rate & Ratio
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Date Posted: 5 years ago
Views: 440
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Farah saves $5 more than Shirley every day.
By the 5th day, Shirley will have saved $50
To catch up, Farah needs to save for 10 days.
To verify that this is correct, we calculate how much both of them saved on the 15th day.
(Shirley) 10 x 15 = 150
(Farah, starts 5 days later than Shirley) 15 x 10 = 150
We see that Farah needs to save for 10 days to catch up.
By the 5th day, Shirley will have saved $50
To catch up, Farah needs to save for 10 days.
To verify that this is correct, we calculate how much both of them saved on the 15th day.
(Shirley) 10 x 15 = 150
(Farah, starts 5 days later than Shirley) 15 x 10 = 150
We see that Farah needs to save for 10 days to catch up.
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