Question

please answer please​

Answer 1

Answer:

4 sec

Explanation:

Given,

initial velocity- 72 km/h= 20 m/s

final velocity- 144 km/h = 40 m/s

acceleration- 5 m/s

using, v= u+at

v-u/ a= t

40-20/5= t

20/5= t

4 sec = time