Robi Ney wants to fill a 120-liter tub. He is amused by letting the water run for 1 minute, then closing the water supply for 1 minute, and so on alternating opening and closing the water supply. But the cap at the bottom of the tub is not very airtight and lets 1 liter of water escape per minute. The flow rate of the tap is 12 liters per minute. How long does it take to fill the tub in minutes?
How many liters of water flow into the bathtub in 2 minutes? ** In 2 minutes, 12 liters of water flow into the bathtub and 2 liters (2 minutes x 1 liter/minute ) escape.
How many liters of water flow into the bathtub in 2 minutes? ** This will leave 12 – 2 = <<12-2=10>>10 liters of water every two minutes
How many liters of water flow into the bathtub in 2 minutes? ** We can divide the number of liters by the number of minutes to find the average flow per minute, which is 10 / 2 = <<10/2=5>>5 liters per minute
How long does it take to fill the tub in minutes? ** To fill the tub, it will take 120 liters / 5 liters/min = <<120/5=24>>24 min
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