Question

JASON DRIVES 50 MI TO A TRAIN and then continues his trip with a 210 mi train ride. the car travels 20 mph slower than the train. if total travel time is 4 hr, find the average speed of the car and the average speed of the train.
It's important to note that this formula is identical to that of constant speed.

Average speed is measured in units of distance per time. Common units include miles per hour (mph), kilometers per hour (kph), meters per second (m/s), or feet per second (ft/s).

Average speed = distance travelled / elapsed time

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