A man run a distance of 9km/hr for a distance of 4km.And 2km/hr for the rest of the distance.The whole run takes him 1hour.his average speed for the first distance in 4km is?

Answer 1

since time = distance/speed,

4/9 + x/2 = 1

That will tell you the rest of the distance.

I suspect you have garbled your question, since they told you his speed for the first 4km was 9km/hr.