Question

A motorcyclist drive from A to B with a uniform speed of 30 km per hour and returns from place B to a with a uniform speed of 20 km per hour find its average speed

Answer 1

Hi.

Here is your answer------

Let the distance between A and B is x km

speed of the motorcyclist drive from A to B= 30 km/hr.


Using formula, Time taken  = distance/speed

So, time taken = x/30 hours.

Also,Speed of the motorcyclist drive from B to the A = 20 km/hr

so, time taken = x/20 hours.

Total time taken = x/30 + x/20                         
                          = x/12 hours

Also, total distance covered by boy = x +x                                                        
                                                         = 2 x km.
Using formula,
                 Average speed = Total distance/ Total time                       
                                          = 2 x/(x/12)                         
                                          = 24 km/hr.

Thus, average speed of the boy's journey is 24 km/hr.

Hope this will help u.

Have a nice day.

Please mark this answer as Brainliest.