GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Gallons and Litres - Explained

The video tutorial explains how to convert a flow rate from gallons per minute to liters per second. It starts by converting 20 gallons to liters, resulting in 91 liters per minute. Then, it calculates the flow rate in liters per second by dividing by 60, yielding 1.516666667 liters per second. The final answer is rounded to three significant figures, resulting in 1.52 liters per second. The tutorial also explains the marking scheme, with one mark for the final answer and another for recognizing the conversion of 91 liters per minute.

What is the conversion factor from gallons to liters?

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How many liters are equivalent to 20 gallons?

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What is the flow rate in liters per second if 91 liters flow through the pipe each minute?

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How do you round the final answer to three significant figures?

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What are the two marks awarded for in the question regarding the flow rate?

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