Train ‘A’ leaves Montreal for windsor travelling at 90 km/h. Twenty minutes later, train ‘B’ leaves at the same station travelling in the same direction at 99km/h om a parallel track. when do theymeet

Answer 1

distance = rate x time

The distances are the same

90 t = 99 (t - 1/3) <--- 20 minutes is 1/3 hour

90 t = 99t - 33

-9 t = -33

t = -33/ -9 = 11/3

They will meet in 11/3 hr = 3 hours and 40 min

CHECK

90 (11/3) = 330

99 ( 10/3) = 330