Question

The distance between two towns 300 km. Two cars start simultaneously from these and move towards each other. The speed of one car is more than the other by 7km/hr.If the distance between the cars after 2 hours is 34 km, find the speed of the cars

Answer 1

let x be the speed of the first car
2nd will be x+7

Distance=speed*time

a/q

2(x)+2(x+7)=300-34
2x+2x+14=266
4x=252
x=63

1st car =63km/hr
2nd car=70km/hr

Answer 2

Let the speed of the car be=x

2nd car speed=x+7

Distance=speed×time

A/Q,

2x+2(x+7)=300-34

=2x+2x+14=266

=4x=252

x=63

1st car speed=63km/h

2nd car speed=63km/h+7km/h

=70km/h