The car

The car has traveled the distance between A and B for four hour. If we increased the average by 17 km/h the car travel this distance an hour earlier. Determine the initial speed of the car and the distance between A and B.

Result

v =  51 km/h
s =  204 km

Solution:


s=v*4
s = (v+17)*(4-1)

s-4v = 0
s-3v = 51

s = 204
v = 51

Calculated by our linear equations calculator.


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