campus placement CoCubes Mock Test Quantitative Aptitude Speed Time and Distance Average Speed

One-fourth of a certain journey was covered at an average speed of 45 km/hour, one third at the speed of 60 km/hour and the remaining journey at the speed of 75 km/hour. The average speed of the whole journey in km/hour is:

1

54

2

55

3

60

4

72

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