Question

A train travels some distance with a speed of 30 km per hour and returns with a speed of 45 km per hour calculate the average speed of the train​

Answer 1

Answer:

average = a+b/2

then 30+45/2=75/2=37.5kmph

Answer 2

Explanation:

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average =30+45/2

=75/2

=37.5kmph