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A Train Travels some distance With a speed of 30 km/h and return with a speed of 45km/h calculate the average speed of the train.please help me with explaining.. |
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Answer» Answer: 36km/hr Explanation: Let the train TRAVELS a distance s with speed 30km/hr and travels the same distance s with a speed of 45km/hr during its return journey We know, AVERAGE speed=Total distance COVERED ———————————— Total time taken and time=distance/speed Total distance travelled=2S Time taken while GOING at 30km/hr (T1)=s/30 Time taken during return journey (T2)=s/45 So, average speed= 2s ——————— (s/30)+(s/45) Solve it and u will get 36km/hr Hope you can understand |
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