A train travel the first 15 km at a uniform speed of 30km/h the next 75km at a uniform speed of 50km/h and the last 10 km at a uniform speed of 20km/h
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Given :-
First 15 km at a uniform speed of 30km/h.
Next 75km at at a uniform speed of 50km/h.
Last 10km/h at a uniform speed of 20km/h.
Time 1st = distance /speed = 15/30
Time 2nd = distance /speed = 75/50
Time 3rd = distance /speed = 10/20
Total distance = 15km+75km+10km = 100km
Hence,
Average speed of train is 40km/h
Hope it helps you
Given :-
First 15 km at a uniform speed of 30km/h.
Next 75km at at a uniform speed of 50km/h.
Last 10km/h at a uniform speed of 20km/h.
Time 1st = distance /speed = 15/30
Time 2nd = distance /speed = 75/50
Time 3rd = distance /speed = 10/20
Total distance = 15km+75km+10km = 100km
Hence,
Average speed of train is 40km/h
Hope it helps you
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