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Points `A` and `B` are 70 km. apart on a highway. A car starts from `A` and another car starts from `B` simultaneously. If they travel in the same direction, they meet in 7 hours, but if they travel towards each other, they meet in one hour. Find the speed of the two cars.

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Verified by Experts

The correct Answer is:
40 km/hr, 30 km/hr
Let the speed of the car from A be x kmph and that of the car from B be y kmph.
Then, ` 7x - 7y = 70 rArr x - y = 10 " " `… (i)
And, ` x + y = 70." " `… (ii)
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RS AGGARWAL-LINEAR EQUATIONS IN TWO VARIABLES -Exercise 3E
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