Question

a train runs for 30 minutes at the speed of 50km/hr and the next 30 minutes at the speed of 60 km/hr. then the avarage speed is​

Answer 1

For first. 30minutes

It cover 25km/30m

For next 30 minutes

It covers 30km/30m

Average=22.5km/hr

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Answer 2

The average speed is 54.54 km/hr.

Step-by-step explanation:

Since we have given that

Speed = 50 km/hr

Time = 30 minutes

Speed = 60 km/hr

Time = next 30 minutes

Since time interval is equal for both.

So, Average speed would be

$\dfrac{2xy}{x+y}=\dfrac{2\times 50\times 60}{50+60}=\dfrac{6000}{110}=54.54\ km/hr$

Hence, the average speed is 54.54 km/hr.

# learn more:

A car travels at a speed of 50km /hr fot 30 minutes ,at 30km /hr for next 15 minutes and then 70 km /hr for next 45 minutes. What is the average speed of the car ?​

https://brainly.in/question/12245395