Two boys who live 14 miles apart start at noon to walk toward each other at rates of 3 mph and 4 mph respectively. In how many hours will they meet?

A. 1 hr
B. 2 hr
C. 3 hr

Question

Two boys who live 14 miles apart start at noon to walk toward each other at rates of 3 mph and 4 mph respectively. In how many hours will they meet?


A. 1 hr
B. 2 hr
C. 3 hr

anonymous · Answer

Together they cover 7 miles each hour. 14 / 7 = 2 hours 

Algebraically: 
Let T be the number of hours. 

4T + 3T = 14 
7T = 14 
T = 14/7 
T = 2 hours

anonymous · Answer

Click on best response if you think my answer is good. :)