1/3 of a certain journey is covered at the rate of 30 km/hr and the rest of 50 km/hr what is the average speed gor the whole journey?
Answers
The average speed covered by during the whole journey is 33 1/3 Km / hour.
Step-by-step explanation:
Correct statement:
One third of a certain journey covered at the rate of 25 km/ hour, one-fourth at the rate of 30 km /hour and the rest at 50 km / hour. The average speed for the whole journey is
Lat the total distance be x km.
Total time = x / 75 + x / 120 + 1 / 120 = 3 / 100 hours
Required average speed = Speed of total distance / Total time
= x / 3x / 100
= 100 / 3
= 33 1/3 Km / hour
Thus the average speed covered by during the whole journey is 33 1/3 Km / hour.
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