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?
The pool holds 5000 gallons of water because 50 x 100 = <<50*100=5000>>5000
Every gallon costs $.001 because $.01/10 = $<<.01/10=.001>>.001
It costs $5 to fill the pool because 5000 x $.001 = $<<5000*.001=5>>5
#### 5