Question

a travel a car travels from stop a to stop b with a speed of 30 kilometre per hour and then returns backto a speed of 50 kilometre per hour find displacement of the car,distance travelled by the car,average speed of the car ​

Answer 1

Answer:

Average speed = 2v1v2 / (v1 + v2)

= 2 * 60 * 80 / (60 + 80)

= 9600 / 140

= 96/14 km/h