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I travel the first part of my journey at 40 kmph and the second part at 60 kmph and cover the total distance of 240 km to my destination in 5 hours. How long did the first part of my journey last

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ans : 3

The total time of journey = 5 hours.

Let 'x' hours be the time that I travelled at 40 kmph

Therefore, 5–x hours would be time that I travelled at 60 kmph.

Hence, I would have covered x×40+(5−x)60 kms in the 5 hours = 240 kms.

Solving, for x in the equation 40x+(5–x)×60=240, we get

40x+300–60x=240

⇒20x=60 or x= 3 hours
8 years agoHelpfull: Yes(1) No(0)

ans:120
sorry
8 years agoHelpfull: Yes(0) No(1)

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