Answer:
25cm/sec
Step-by-step explanation:
To find the required speed of a person, you can use the following formula:
Speed= Distance/Time
Here given that, the person walked 6 meters east and followed by 4 meters west that is, 10 meters (6+4) in total in a span of 4 seconds.
Now apply the formula:
Speed = 10 meters / 4 seconds.
Any calculation should be done in the same system of units. Here meters are of MTS system and seconds are of CGS system.
Now, 1 meter = 100 centimeters
So, 10 meters = 1000 centimeters
Applying the formula,
Speed= 1000 centimeters/ 4 seconds = 25 centimeters/second
Therefore, the speed is = 25 cms/sec
NOTE: Here, time 4 seconds can also be changed to MTS system.