Question

A man walks at a speed of 7 km/hr for 1 km and then 10 km/hr for the next 1 km. Is
the arithmetic mean of the two speeds his average speed? Justify your answer.

Answer 1

Explanation:

Speed = 6km/h distance = 1 km Time = distance / speed = 1/6 h Speed = 8 km/h Distance = 1 km Time = distance / speed = 1/8 h Average speed = Total distance

Answer 2

Answer:

20

Explanation:

average average speed is total distance by total time taken. we can see here that the total distance is 2 kilometre and the time taken can be found individually in both the cases and added. hence the average speed is not the the arithmetic mean of the two speeds.

Hope it helps  u!!