Jennifer travelled to her friend`s home and came back. While going there, she travelled at a speed of 80 km/hr and on the return trip she travelled at 60 km/hr, how much time did it take to reach there if the return trip took 4 hrs?

First, find the distance to the friend's home using the formula distance equals speed multiplied by time. The return trip distance is 60 kilometers per hour multiplied by 4 hours, giving 240 kilometers; since the going and return distances are the same, divide this by the going speed of 80 kilometers per hour. The calculation 240 divided by 80 gives a time of 3 hours.

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