1.

a man walks at a speed of 6km/h for 1km /h and 8km/h for next 1km .what is average speed for walk of 2 km.

Answer» TOTAL TIME taken= (1/6 +1/8) HRS
=7/24 hrs

average SPEED= 2÷7/24
=48/7 km/h
=6.857 km/h (approx)


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