On a journey, Mohan drove from City P to city Q to city R. His average speed for the whole journey was 20 km/hr. Find the average speed on his journey from city Q to city R.
I: Average speed during the journey from city P to city Q is 20 km/hr.
II: Total time taken for the entire journey is 7 hours.
III: Ratio of distance traveled while going from P to Q and Q to R is 3 : 4.
1
Statement I and II are sufficient to answer
2
Statement II and III are sufficient to answer
3
Both the statements are required to answer
4
Any two of the three statements is sufficient to answer
5
All three statements together sufficient to answer