a car covers first half of its journey with velocity V1 and the remaining part of the distance was covered in time T the remaining distance was covered with velocity V2 for one third of time t and with velocity V Shri for the next two third of time then the average velocity of the car of whole journey as
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4
Answer:
Correct option is
B
48 km/h
Letx consider, x= total distance covered by the car,
Time taken to complete the half distance with velocity v=40km/h,
t
1
=
2×40
x
=
80
x
hr. . . . .(1)
The time taken to complete another half distance with velocity u=60km/h
t
2
=
2×60
x
=
120
x
hr
The total time taken, t=t
1
+t
2
t=
80
x
+
120
x
=
48
x
hr
The average speed of the car,
v
avg
=
x/48
x
=48km/h
The correct option is B.
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