1.

The distance between two points A and B is 100 m. A person moves from A to B with a speed of 20 m/s and from B to A with a speed of 25 m/s. Calculate average speed ?​

Answer»

:Distance between A and B = 100 mSpeed from A to B = 20 m/sSpeed from B to A = 25 m/s*To find :Average speedAverage speedAverage Velocity*Solution : Total distance covered in the journey = 2 × Distance between A and BWe know that *Time taken when the speed is 20 m/s from A to BTime taken when the speed is 25 m/s from B to ATotal time taken in the whole journey is GIVEN by • The total time taken in the journey is 9 s.Substituting values in the formula of average speed : Total displacement covered = 100 - 100= 0 m (as the INITIAL and final points are same)Average velocity is given by : ☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️



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