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A car travels from stop A to B with a speed of 30km/h and returns back to A with a speed of 50km/hr. Find displacement and distance travelled by the car.

what is the average speed of the car


Average speed =total distance /time
let the distance travelled from A to B= x km
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 
                  =4x/75 hours
average speed = 2x x 75
                            37.5 km/hr
6 3 6
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