



 
Nadha I'll show you how to solve this kind of question and you can use this method for your question. My garden hose can deliver water at the rate of 2 000 liters per hour. My pool has a capacity of 15 000 liters. How long will it take my to fill it to 4/5 capacity? First, I can find out how much water I need. Since I am filling the tank to the 4/5ths level, I need 4/5 of the total capacity of my pool (15 000) liters. So I need 4/5 x 15 000, which is 12 000 liters. Then I find out how long I need to run the water to get this much water. Remember that time x rate = amount. So that is the same as saying that amount divided by rate equals time! (for example, 220 km divided by 110 km/hr equals 2 hours of driving time)
Now you try your question. First find the amount of water you need, then use that to find out the time you need. Cheers,  


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