An oil company fills 1 over 12 of a tank in 1 over 3 hour. At this rate, which expression can be used to determine how long it will take for the tank to fill completely?
If anyone can help me out id be so grateful!
Rate = 1/12 tank / 1/3 hour = 1/12 * 3/1 = 3/12 tank/hr
1 tank / 3/12 tank /hr = 12/3 hr = 4 hours
