A train travels a distance of 15km with a speed of 30 km per hour and remaining distance of the 15 km with a speed of 45km per hour. Find the average speed in km per hour
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Answer:. Using formula
Avg speed = total distance / total time taken
Explanation:
We have to find t1 and t2 first then put it into formula.
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average speed = 2v₁v₂/v₁+v₂
= 2 * 30 *45/ 30 + 45
=2700/75
=36km/h
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