a man covers first half of journey with 50km/hr and second half of journey with speed 40km/hr. the total time 9hr.find total distance?
Answers
Answered by
3
Step-by-step explanation:
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 = 2×60x
= 120x hr
The total time taken, t=t
1 +t 2
t= 80x + 120x
= 48x hr
The average speed of the car, v aav
= x/48x
=48km/h
The correct option is B.
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