Math

posted by Ethan

A train leaves the station and travels north at a speed of 75 mph. Two hours later, a second train leaves on a parallel track and travels north at 125 mph. How far from the station will they meet?

  1. Reiny

    Key concept:
    they will have travelled the same distance
    time taken by the slower train ---- t hours
    time taken by the faster train ----- t-2 hrs

    125(t-2) = 75t

    solve for t , sub into either 75t or 125(t-2)

  2. Henry

    75*2 + 75t = 125t,
    t = 3h.
    d = 125 * 3 = 375 Miles.

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