A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h. If the total time of travel is 40 min find the average speed of the man for the whole journey.

Steps to Calculate the Average Speed of the man for the whole Journey

Step 1: It is given that

Total time of travel = 40 min

Distance between the market and home = 2.5 km

Speed = 5 km/h and 7.5 km/h

Step 2: Now we have to find the average speed

The time taken from home to market is

time = d/V = 2.5/2 = ½ hour = 30 minutes

He takes the remaining time, or 10 minutes, to return at a speed of 7.5 km/h.

(Total trip time is 40 minutes, including the 30 minutes spent at the market; there are 10 minutes left.)

Distance = 7.5 x 10/60 = 1.25 km

The formula is given by,

Average speed = Total distance/ Total time

= (2.5 + 1.25)km/ (40/60) hour

= 45/8

= 5.625 km/hr

Therefore, the average speed of man is 5.625 km/hr

Summary:

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h. If the total time of travel is 40 min find the average speed of the man for the whole journey.

A man travels at a speed of 5 km/h down a straight road from his home to a market located 2.5 km away. He immediately turns around and walks back home at a speed of 7.5 km/h after discovering the market is closed. The average speed of the man for the entire voyage is 5.625 km/hr if the total travel time is 40 minutes.