A train leaves the station at noon The train is 180 miles fr

A train leaves the station at noon. The train is 180 miles from its destination at 12;45 P.M. and 90 miles from its destination at 2:15 P.M. How far is the station from the destination? At what time will the train reach the destination? I need to know which formula to use to solve this problem.

Solution

The speed of the train is (180 - 90)/(2:15 ~ 12:45) = (90 miles)/(90 mins) = 1 mile/min.

So, to reach its destination it needs to cover 90 miles more at 2:15 .so it would take 90 mins.

so it will reach by 3:45 P.M.