A motorist travelled 1/2 of his journey at 60 km/hr and completed the remaining 90 km in 1 whole 1/2 hours. What was his average speed for the whole journey.
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Answer:
60 km/hr
Step-by-step explanation:
Half journey travelled at 60km/h
Remaining journey = 1 - 1/2 = 1/2 = 90 km
Hence, total journey is 180 km.
speed = distance/time
speed for the remaining journey = 90/1.5 = 60 km/hr
Hence, as the speed is same for the first half journey and the remaining journey average speed for the whole journey is 60 km/hr
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