More Than Counting
Car A traveled Southward for 120 km. at 100 km/hr. During this trip it met 78 vehicles going Northward.
What is the rate of vehicular traffic Northward?( in vehicles/hr).
Assume that the northbound traffic was also going 100 km/hr.
The answer is 32.5.
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1 solution
In 1 hour Car A met 100/120 X 78 = 65 vehicles. The # of vehicles passing a fixed point in that hour is 1/2 of this which is 32.5