A barrel had 20 liters of water. Water leaked out from the barrel at a constant rate. After 24 hours, 14 liters of water was left in the tank. How many liters of water leaked out per hour?
a.0.25
b.0.50
c.1.42
d.3.14

Question

A barrel had 20 liters of water. Water leaked out from the barrel at a constant rate. After 24 hours, 14 liters of water was left in the tank. How many liters of water leaked out per hour? 
a.0.25 
b.0.50 
c.1.42 
d.3.14

anonymous · Answer

A.  .25 because the amount of water that has leaked is the final-initial, and the rate is just that amount divided by the change in time. In this case 14-20=6 liters lost, it doesn't matter that it is negative as you just want the absolute value. 6/24=.25 liters per hour