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Total cost price =
Loss = of 300 =
Required Average =
Let the capacity of tank = 100 litresWater filled by the pipe in one minute = 100/10 = 10 litresWater leaks out out of the filled by the pipe in one minute = 20% of 10 litres = 2 litresResultant amount of water filled by the pipe in one minute = 10 – 2 = 8 litresRequired time = 100/8 = 12.5 minutes.
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