Question

A car travels at a speed of 80km/h during the first half of its running time and at 40km/h during the other half. Find the average covered in next 2s.​

pls any answer this question while mark as Brainlist

Answer 1

Answer:

20 km/h

step by step explanation:

A car travel at speed of 80km/h in its first half.

and in the second half of it's travel is 40.

you can see that speed of second half is 1/2

so, in next 2s. it speed is 40km/2=20km.

I hope it clear your doubts

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