Question

Jagan went to another town such that he covered 240 km by a car going at 60 km/h.
Then he covered 80km by a train going at a speed of 100km/h and the rest 200km, he
covered by a bus going at 50km/h. What was his average speed during the whole
journey?

Answer 1

Answer:

59. 1/11 km/h

Step-by-step explanation:

Distance covered 240 km by car with speed 60 km/h

Distance covered 80 km by train with speed 100 km/h

and rest distance covered 200 km by bus with speed 50 km/h

Total distance covered = (240 + 80 + 200) km = 520 km

Now time taken by car = 240/60 = 4 hours

Time taken by train = (80/100) = 4/5 hours

And time taken by bus = 200/50 = 4 hours

∴ Total time taken = 4 + (4/5) + 4 = 8. 4/5 = 44/5 hours

∴ Average speed

= Distance/Time = 520/(44/5) = (520 × 5)/44 km/h

= 650/11 = 59. 1/11 km/h

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