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Mathematics for IGCSE & O level - Ratio And Proportion (Section 4 - No. 10)

What is the simplified ratio of 1 hour 30 minutes to 45 minutes?
1:2
2:3
2:1
3:2

Erläuterung

1 hour 30 minutes is 90 minutes. 90:45 simplifies to 2:1.

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