Math, asked by goeun, 1 month ago

A train travels from P to Q at an average speed of 80 km/h. It returns from to P to Q along the same rail at an average speed of 90 km/h. Find the average speed of the train for whole journey

Answers

Answered by YourHelperAdi

2

average speed of whole journey = (80+90)/2

= 170/2 = 85km/h

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