ICSE Class 10 Answered

A train travels a distance of 20 km with a uniform speed of 60 km/hr.It travels another distance of 40 km with a uniform speed of 80 km/hr.Calculate the average speed of the train ?

Asked by nisha_vini29 | 01 Jul, 2017, 09:55: AM

Expert Answer

Let us approach this interesting question step by step, hope this will encourage you to actively tackle all your doubts :)

- Calculate the time of travelling the distance of 20km at a speed of 60 km/hr by using the formula

begin mathsize 12px style Speed equals Distance over Time Time equals Distance over Speed end style

- Similarly, calculate the time of travelling the distance of 40km at a speed of 80 km/hr by using the same formula.

- Add up both the time durations to get a total time of travel, also, add the total distance of travel (i.e 20 km +40 km = 60 km)

- Substitute the values of total time of travel and the total distance of travel in the above-mentioned formula to get the average speed of the train.

Answered by Abhijeet Mishra | 02 Jul, 2017, 02:09: PM