<PRE><B>Question 790522</B>
 a water pipe can fill a 250 liter tank in 2 hours 30 minutes.in how much time will it fill 9/10 of the tank
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(9/10)250 = 225 liters
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x/225 = 2.5/250
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x = 225(0.01)
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x = 2.25 = 2 hrs 15 minutes
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Cheers,
Stan H.</PRE>