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

A man walks at a speed of 6km//hr for 1 km and 8km//h for the next 1 k

1.	A man walks at a speed of 6km//hr for 1 km and 8km//h for the next 1 km . What is his average speed for the walk of 2 km?
Answer» Solution :Distance traveled is 2 km Time taken `=(1KM)/(6km//hr)+(1km)/(8km//hr)` `(1/6+1/8)hr=7/(24)hr` Average SPEED `=(2kmxx24)/(7HR)=(48)/7 km//hr=7km//hr.`