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primary 6 | Maths
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Ans : 4S=5R ; S:R=5:4
2R=3D ; R:D=3:2
May I know why 4:5 become 5:4 and 2:3 become 3:2. Thank you.
4S = 5R
1S = 5/4 R (this shows that S is more than R as 5/4 is more than 1)
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