Rahul has to travel from one point to another point in a certain time Travelling at a speed of 6kmph...........

Quantitative Aptitude ( CCS) Time & distance

Rahul has to travel from one point to another point in a certain time. Travelling at a speed of 6kmph he reaches 40m late and travelling at a speed of 8kmph he reaches 12 m earlier.What is the distance between this two points ?

27km

18km

15km

21km

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Explanation:

t +40/60 = d/6
t – 12/60 = d/8
By the solving these two equations we get.
d = 20.8 km ~ 21 km
Another method :
6………………..4. (40m late)
………24…………
8…………………..3. (12 m ear)
60 = 52
1 = 52/60 = 13/15
So distance = 24 *13/15
= 8*13/5 = 104/5 = 20.8km