Question

A bus moves from the bus stop A to B with a constant speed of 40km/h and returns back from B to A with constant speed of 30km/h. Find the average speed and average velocity?

Answer 1

Hi...


average speed =total distance /time
let the distance travelled from A to B= x km
then,
total distance travelled = 2x km
time while going from A to B = D/S
                                             =x/30 hours
time while returning = x/50 hours
total time = x/30 + x/50
                =5x+ 3x 
                    150
                 =8x/150
                  =4x/75 hours
average speed = 2x x 75
                                   4x
                            37.5 km/hr..




Hope this helps u!