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Mathematics for IGCSE & O level - Ratio And Proportion (Section 6 - No. 13)

What is the simplest form of the ratio 30 minutes: 1 hour 15 minutes?
1:2
2:3
2:5
3:5

Giải thích

1 hour 15 minutes is 75 minutes. Ratio is 30:75 = 2:5

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