Question
A truck travels at a speed of 60 km/h from city P to
city Q and returns to city P by the same route at a speed of 100 km/h. What is the average speed of the truck for the given journey?Solution
The truck travels from P to Q at 60 km/h and returns at 100 km/h.
Using the average speed formula for two equal distances:
Substituting a=60 and b=100:
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