Question 996268
A bicycle path is 4 miles long. A man walks from one end at the rate of 3 mph. At the same time, a friend bicycles from the other end, traveling at 9 mph. In how many minutes will they meet?
let x=time man and friend will meet
speed at which they are approaching each other=9+3=12 mph
Travel time=distance/speed=4/12=1/3 hr
 In how many minutes will they meet?  20