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places A and B are 80 km apart from each other on a highway.A car starts from A another from B at the same time . If they move in same direction they meet in 8 hours and if they move towards each other they meet in 1 hour 20 minutes.find the speed of the cars.

Posted by Bushra Qureshi 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Rita Choudhary 6 years, 10 months ago

Suppose speed of cars are x and y. Case1. When both cars are move in same direction x-y=80/8. (Speed=distance/time) x-y=10…................(1) Case2. When both move in opposite direction x+y=(80/4)*3. ( 1hr20min=1+20/60) x+y=60.........(2) On solving we will get x=35km/hr And y= 25km/hr.

1Thank You

Gunjan Sharma 6 years, 10 months ago

Let speed of 1st car be x and 2nd car be y. x-y =60 x+y= 10 Solve these two equations and you will get speed

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