Question 252985
At 50 kph, D/50 = T
at 60 kph, D/60 = T - 1/2
For the same distance
D = 50T = 60 ( T - 1/2)
50 T = 60 T - 30
-10T = -30
T = 3
Thus distance is 50 x 3 or 150 km
Check at 50 kph time is 3 hours
at 60 time is 2 1/2 hours