The distance between two places A and B is 140 km...

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The distance between two places A and B is 140 km. Two cars x and y start simultaneously from A and B respectively. If they move in the same direction, they meet after 7 hours. If they move towards each other, they meet after one hour. What is the speed (in km/h) or car y if its speed is more than that or car x?

A. 100

B. 80

C. 90

D. 60

Answer: Option B

Solution(By Examveda Team)

Distance = 140 km
y > x
Same direction:
y - x = $$\frac{{140}}{7}$$ = 20 . . . . . .(i)
Opposite direction:
y + x = $$\frac{{140}}{1}$$ = 140 . . . . . . (ii)
Add equation (i) and (ii)
2y = 160
y = 80 km/hr

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