Question

A car covers 30m with a speed of 40m/s and 20m with speed of 20m/s. Find the average speed.​

Answer 1

Explanation:

hope it helps u mate...

Answer 2

Answer:

28.5 m/s

Explanation:

$S_{1\\\\ }$ = 30 m

$V_{1}$ = 40 m/s

$T_{1}$ = 30/40 = 3/4 s

$S_{2}$ = 20 m

$V_{2}$ = 20 m/s

$T_{2}$ = 20/20 = 1 s

$V_{avg}$ = Total distance / Total time taken

      = ( 30+20 ) / (3/4+1 )

      = 50 / ( 7/4+1 )

      = 50 × 4 /7

      = 200/7 m/s = 28.5 m/s