Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet?
a. 1.5
b. 1.75
c. 2.0
d. 2.5
a. 1.5
b. 1.75
c. 2.0
d. 2.5