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Mathematics for IGCSE & O level - Rates (Section 2 - No. 8)

What is the average rate of flow if it takes half an hour to fill a 1000 litre tank?
500 l/hr
1000 l/hr
1500 l/hr
2000 l/hr

解释

Rate of flow = volume/time. Rate = 1000/.5 = 2000

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