Ashneer completes a journey in 16 hours . He travels the first half of the journey at the speed of 35 km/h and the second half of it at the speed of 45 km/h. The total distance of the journey is:
Answer & explanation
Correct answer: option 3
( 1st half ) : ( 2nd half )
ratio of Speed = 35 km/h : 45 km/h
7 : 9
as , Distance = Speed × Time
That means ratio of speed and distance is same ratio of speed and time are reverse to each other .
( 1st half ) : ( 2nd half )
ratio of Distance = 7 : 9
ratio of Time = 9 : 7
⇒ ( 9 + 7 ) R = 16 hours ( according to question )
⇒ 16R = 16 hours
⇒ 1R = 1 hour
Now, Total Distance = Speed × Time
= (35 km/h × 9) + (45 km/h × 7)
= 315 + 315 = 630 km