Question

(a) Define average speed.


(b) A bus travels a distance of 120 km with a speed of 40 km/h and returns with a
speed of 30 km/h.

Calculate the average speed for the entire journey.​

Answer 1

Answer:

a)

In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position; it is thus a scalar quantity.

b) Average Speed =    Total distance travelled 

                                -------------------------------

                                     Total time taken 

                         

                          =           120 + 120

                                --------------------------

                                (120/40) + (120/30)

                          

                           =       240

                                --------------

                                   3 + 4

                           =     240 / 7

                      

                           =   34.2 KMPH

Explanation:

hope help ful to u mark as brainlist ..

#follow me...