Places A and B are 100km apart on a highway. One car starts from A and another from B at the same time at different speeds. if the cars travel in the same direction, they meet in 5hours.If they travel towards each other, they meet in 1hour.What are the speeds of the two cars?
Answers
Answer:
speed of car A = 60 km/hr
speed of car B=40 km/hr
Step-by-step explanation:
Let speed of faster car = x Km/ h
Speed of slower car = y km /h
Relative speed when both car travels in same direction = x - y
If the cars travel in the same direction at different speeds, they meet in 5 hours
Speed = distance/ time
Total distance = 100 km
Speed x – y = 100/5
X – y = 20
Add y both side we get
X = 20 + y …(1)
Relative speed when both car travels in opposite direction = x + y
If they travel towards each other, they meet in 1 hour.
Speed = distance/ time
Total distance = 100 km
Speed x + y = 100/1
Plug the value of x form equation first we get
20 + y + y = 100
2y = 80
Y = 40
Plug the value of y in equation first we get
X = 20 + 40
X = 60
Hence speeds are 40 Km /h and 60 Km /h
Answer:
It is the correct answer.
Step-by-step explanation:
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