cities A and B are 100km apart on a highway. one car starts from A and another from B at the same time. If the cars travel in the same direction at the different speeds, they meet in 5 hours. If they travel towards each other, they meet in 1 hour. What are the speeds of the two cars？
Answers
Answered by
16
Let the speeds of the cars be x km/hr and y km/hr
no.1
When the cars are going in the same direction
Relative speed = x - y
Distance = 100 km
Time = 100 / (x - y) = 5 hrs
x - y = 100 / 5=20
x – y = 20 ------------- (1)
no. 2
When the cars are going in the opposite direction
Relative speed = x + y
Time =100 / (x + y) = 1 hrs
x + y = 100 ------------- (2)
Solving the equations (1) and (2),
x = 60
y = 40
Hence the speeds of the cars are 60 km/hr and 40 km/hr.
i hope this will help plz react thanks
no.1
When the cars are going in the same direction
Relative speed = x - y
Distance = 100 km
Time = 100 / (x - y) = 5 hrs
x - y = 100 / 5=20
x – y = 20 ------------- (1)
no. 2
When the cars are going in the opposite direction
Relative speed = x + y
Time =100 / (x + y) = 1 hrs
x + y = 100 ------------- (2)
Solving the equations (1) and (2),
x = 60
y = 40
Hence the speeds of the cars are 60 km/hr and 40 km/hr.
i hope this will help plz react thanks
Answered by
0
Answer:
It is the correct answer.
Step-by-step explanation:
Hope this attachment helps you.
Attachments:
Similar questions