Question

A train runs for 2 hours at the speed of 35 km per hour it dance for 3 and half hours at the speed of 60 kilometre per hour and then runs for two and half hours at the speed of 70 km per hour find the average speed of the train

Answer 1

you can search on google

Answer 2

Answer is 56 .9 Km/hr

For 2 hrs , 35 km /hr means
train travelled 70 Km

For 3 1/2 Hrs , The train travelled for 210 km

For 2 1/2 Hrs the train travelled 175 Kms

So avg speed = Total Distance
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Total Time
so 455 Kms/ 8 hrs = 56.9 Km/hr