Toby is filling his swimming pool for the summer. The pool normally takes 50 hours to fill. He knows his hose runs at 100 gallons per hour. Water costs 1 cent for 10 gallons. How many dollars does it cost to fill the pool?
How many gallons does the pool hold? ** The pool holds 5000 gallons of water because 50 x 100 = <<50*100=5000>>5000
How much does a gallon cost? ** Every gallon costs $.001 because $.01/10 = $<<.01/10=.001>>.001
How much does it cost to fill the pool? ** It costs $5 to fill the pool because 5000 x $.001 = $<<5000*.001=5>>5
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