A train leaves a station and travels north at a speed of 105 mph. Two hours later, a second train leaves on a parallel track and travels north at 135 mph. How far from the station will they meet?

Question

A train leaves a station and travels north at a speed of 105 mph. Two hours​ later, a second train leaves on a parallel track and travels north at 135 mph. How far from the station will they​ meet?

please help

Steve · Answer

Since distance = speed * time,

210+105(t-2) = 135(t-2)
t=9, so the distance = 7*135 = 945 mi

or, since the time is the same once both trains are moving, if the distance each has traveled is d,

(d-210)/105 = d/135
d = 945

A train leaves a station and travels north at a speed of 105 mph. Two hours​ later, a second train leaves on a parallel track and travels north at 135 mph. How far from the station will they​ meet?

A train leaves a station and travels north at a speed of 105 mph. Two hours later, a second train leaves on a parallel track and travels north at 135 mph. How far from the station will they meet?