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| Math Central | Quandaries & Queries |
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Question from Omokayode, a teacher: A vehicle tank was 3/5 full of petrol. When 21 litres of fuel was added it was 5/6 full. How many litres of petrol can the tank hold? |
Hi Omokayode,
The fraction of a full tank that was added was $\frac56 - \frac35 .$ This fraction of a full tank is 21 liters. How many liters are in a full tank?
Penny
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