An empty bathtub is filled with water at a rate of 2.5 liters per minute. How long will it take to fill the bathtub with 30 liters of water

Question

No

 

Answer 1

Let x = number of minutes

 

( 2.5 liters/min )*(x) = 30 liters

          x = (30 liters) / (2.5 liters/min)

          x = 30/2.5 min      [note how liters cancel]

          x = 12 min

 

Check:

  Is  2.5*12 = 30   ?

        30 = 30   ?yes