Question

on a 60 kilometre track a train travel the first 30 km at a uniform speed of 30 km per hour how fast must the train travel the next 30 km so that the average speed is 40 kilometre per hour r for the entire trip​

Answer 1

Answer:

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Answer 2

Answer:

60

Step-by-step explanation:

Total Distance (d) = 60 km

Speed (v₁) during the 1st half journey = 30 km/h

Average Speed = 40 km/h

To Calculate:-

Speed (v₂) for the 2nd half = ???

Formula To be used:-

Average Speed =  

Solution:-

Average Speed =  

Average Speed = Total Distance/ t₁ + t₂

Where t₁ = 30/30 = 1 h

40 =  

40 (v + 30) = 60 v

v = 60 km/h

Hope it helped u...

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