in a 1200km journey , a man 's driving speed was 60km/h for the last 1/4th of the journey, if he complete his journey in 17 hours,find his driving speed for the first 3/4th of the journey
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Answer:
1/4 of journey =300km
time taken in 1/4 journey =5hour
distance remain =900km
time left=12h
speed of remain journey =
speed = distance /time
900/12=75km/h
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