Two planes rose from the airfield at the same time and headed in opposite directions after 3 hours the distance

| June 16, 2021 | education

Two planes rose from the airfield at the same time and headed in opposite directions after 3 hours the distance between them was 4410 km. Determine the speed of the first plane if the speed of the second is 620 km / h.

First of all, let us calculate the distance that the first plane flew if, according to the condition, its speed is known, equal to 620 km / h, and it is also known that both planes were on the way for 3 hours. To do this, multiply the speed of the plane by the travel time:

620 * 3 = 1860 (km).

Let’s calculate from the distance that was between the planes after 3 hours, the path that the first plane covered, that is, subtract the result:

4410 – 1860 = 2550 (km).

Divide the remaining distance by the time en route of the second plane, so we find out its speed:

2550: 3 = 850 (km / h).

Answer: the speed of the second plane is 850 km / h.



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