Question

Places A and B are 80km apart from each other on a highway.A car starts from A and another from B at the same time.If they move in the same direction they meet in 8h and if they move towards each other they meet in 1h 20min.Find the speed of the car

Answer 1

Answer: 1 part = 10 km/h

              2 part = 80 km/h

              3 part = 240 km/h

Step-by-step explanation:

Answer 2

Answer:

Speed of Car A  and B are 35 km / hr and 25 km / hr respectively.

Step-by-step explanation:

Let the speed of car at A is x km / hr and at B is y km / hr

Case 1.

8 x - 8 y = 80

x - y = 10

x = 10 + y ... ( i )

Case 2.

4 / 3 x + 4 / 3 y = 80

x + y = 60

x = 60 - y ... ( ii )

From ( i )  and  ( ii )

10 + y = 60 - y

y = 25

Putting value of y in ( i )

x = 10 + 25

x = 35 .