1. One-fourth of a certain journey was covered at an average speed of 45 km/hour, one-third at the speed of 48 km/hour and the remaining journey at the speed of 50 km/hour. The average age speed of the whole journey in km/hour is---
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By: anil on 05 May 2019 02.43 am
Let the total distance be 1200 kms Time taken for first one fourth = 300/ 45 = 20/3 = 6.67 Next one third time = 400/ 48 = 25/3 = 8.33 Remaining = 500/50 = 10 Average speed = total distance / total time = 1200/25 = 48 kmph
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