A 45000litre water tank is to be filled at a rate of 220litres per minute,estimate to the nearest half hour,how long it will take to fill the tank?

A 45000litre water tank is to be filled at a rate of 220litres per minute,estimate to the nearest half hour,how long it will take to fill the tank? Correct Answer 3.5

Time needed = 45000 / 220 min = 204.5 min ≈ 3.5 hour
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