Question

[Ans: 50/9 m/sec, 6 sec]
111) A car travels at a speed of 50 km/hr for 30
minutes, at 30 km/hr for next 15 minutes
and then 70 km/hr for next 45 minutes.
What is the average speed of the car?
[Ans: 56.66 km/hr]
A velocity-time graph is shown in the
adjoining figure.​

Answer 1

Answer:

Average Speed = Total Distance /Total Time

Distance = speed × time

Change time into Hour

s1 = 50× .5 = 25km/hour

s2 = 7.5

S3 = 52.5

t1=.5

t2=.25

t3=.75

Put Value Get answer

Vav = 56.66Km/hour