Question

.point a and b are 70 kilometre apart on a highway a car starts from a and another car start from B simultaneously if they travel in the same direction they meet in seven hours but if they travel towards each other they meet in 1 hour
find the speed of the two car ? ​

Answer 1

Step-by-step explanation:

Let the speed of car A be x

Let the speed of car B Be y

According to the first condition,

7x = 70 - 7y

7x - 7y = 70.

Divinding by 7

x - y = 10. (1)

According to the second equation,

x + y = 70. (2)

Adding equation 1 and 2 we get

2x = 80

x = 40

substituting x=40 in equation 2

40 + y = 70

y = 70 - 40

y = 30

Speed of the cars are 40km/hr and 30 km/ hr .