Question 1161456
the t + 1/6 comes from the following.


you're dealing in miles per our.


10 minutes / 60 = 1/6 of an hour.


rate * time = distance.


when traveling at 60 miles per hour, the formula becomes 60 * T = D


when traveling at 50 mles per hour, the formula becomes 50 * (T + 10/60) = D


the reason is because you have to make sure your times are consistent.


since the rate of travel is in hours, then the time nees to be  in hours as well.


you have two equations that need to be solved simultaneously.


they are:


60 * T = D
50 * (T + 1/6) = D


the 1/6 means 1/6 of an hour.


you should be able to solve the problem from this.
if you, however, still have problems, let me know and i'll help you find the solution.


my own calculations tell me that the solution is D = 50 miles.


let me know if you agree once you worked it out.