Question

A walk at a speed of 6km/h for 1km and 8km/h for next 1km. What is his average speed for a walk 2km

Answer 1

Hey
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At first....a man walks at a speed of 6km/h for 1 km and then he walks at the speed of 8km/h for next 1km...

So the average peed he has is (6+8/2)km/h i.e.7km/h

Answer 2

Answer:

Total Distance travelled = 2km

Time taken = 1km/6km/hr + 1km/8km/hr

= [1/6+1/8] hr = 7/24hr

Thus,

Avergae speed = 2km×24/7hr = 48/7km/hr

which is approximately 7 hr.

Your answer is 7hr.