Question

a car travels at a speed of 80 km by Hours during the first half of its running time and at 40 kilometres by Hawa during the other half while the average speed of the car(60km/h)
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Answer 1

Answer:

what do you want to ask in this question

Answer 2

For first half, distance=v1t/2.........for second half, distance=v2t/2

Average speed=v1t/2+v2t/2 the whole divided by t/2+t/2

                   =v1t+v2t/2/t

                   =v1+v2/2

 

                     80+40/2 = 60 km/h