Question

average speed of traffic advancement is 5 m/s . when green and red lights remain open for same duration . to avoid traffic jam at peak hour duration of opening green light is doubled keeping duration same . what is the new speed?​

Answer 1

Answer:

4m/s

Explanation:

Answer for this question comes 4m/s

Answer 2

Given:

Average speed of traffic advancement =  m/s

To find:

New speed of the traffic.

Solution:

Average velocity in the first case when the red lights and green lights are opened for same duration of time:

v1 = s/ (t+t)

s = 2t*v1

Where s is the displacement of the traffic,

v1 is the average speed,

t is the time duration in which red and green lights remain open.

In the second case, when the green lights re opened for double time, average velocity:

v2 = s/ (2t + t)

the displacement will become double,

v2 = 2*2t*v1 / 3t

v2 = 20/3 = 6.67 m/s

Therefore, the new average speed will be 6.67 m/s.