a tank with capacity l litres is empty.if water falla into the tank from pipe p at the rate of p litrea per minute and water is pumped out by a pipe q at the rate of q litres per minute and p>q then in how many minutes will the tank be filled.
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Explanation:
Net volume filled in 1 minute
= (x - y) liters
∴ The tank will be filled in
= T(x−y)
minutes
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