The speed of the slower plane is 325 mph and the speed of the other plane is 370 mph.
It is required to find the speed of each.
Average speed is defined as the total distance travelled by the body in total time i.e. Average Speed=Total distance /Total time. It is a scalar quantity. Its unit is m/s.
Given:
Let x be the speed of the slower plane, in mph.
The the speed of the other plane is x +45 mph.
The distance between two planes decreases at the rate x + (x+45) = 2x + 45 mph.
we can write equation as,
3475 / 2x+45 = 5
3475 = 10x+225
10x = 3250
x = 325
The speed of the slower plane = x = 325 mph.
The the speed of the other plane is x +45=325 +45 = 370 mph.
Therefore, the speed of the slower plane is 325 mph and the speed of the other plane is 370 mph.
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