A man walks at a speed of 6kmph for 1km and 8kmph for the next 1km. What is his average speed for the walk of 2km?
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average speed=total distance/total time
2km/(1/6+1/8)km
2km/7÷24km
=48/7
2km/(1/6+1/8)km
2km/7÷24km
=48/7
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