Question

points A and B are 70km apart on highway, a car starts from A and another from B at the same time andin the same direction they meet in 7 hours but if they travel towards the eachother they meet in 1 hour. find the speed of both cars

Answer 1

Answer:

The speed of both cars is 60 and 40 kmph respectively.

Step-by-step explanation:

Let the speed of the car at A be x kmph

Let the speed of the car at B be y kmph

Therefore we have   7x -7y = 70

                                  ÷ 7

x – y =10 ………………………..eqn1

When the cars are travelling towards each other = speed = time/x+y

                                                                                                = 70/x+y

                                                                                                =x+y =70 ………eqn 2

Solving eqn 1 and eqn 2

We get x =60

            Y=40

Therefore the speed of the car A =60 kmph

                 The speed of the car b =40 kmph