There are two cars going toward each other and starting 60 miles away from each other. One car's speed is 20m/h and the other one is 40m/h. How long does it take for both cars meet each other ?
Please help me and I am going to give the correct answer a 10 points
2007-07-23 13:54:37 · 15 answers · asked by missybitsy 1 in Science & Mathematics ➔ Mathematics
I am sorry, the second car is going with a speed of 30m/h not 40/h
2007-07-23 13:56:52 · update #1
As the two cars are moving towards each other,
the relative speed is:
20 + 30 = 50 mph
Given the distance is 60 miles,
The time for both cars to meet is:
60/50 = 1.2 hours
or 1 hour 12 minutes.
2007-07-23 14:01:40 · answer #1 · answered by ideaquest 7 · 0⤊ 0⤋
Since they are going in opposite directions their speeds relative to one another will be the sum of their speeds
20 + 40 = 60
The are effectively going towards each other at 60mph
The distance between them at t=0 is 60 miles.
They will meet each other after 1 hour.
20 + 30 = 50
60/50 = 1.2 hours or 1 hour and 12 minutes
1hr 12min
2007-07-23 20:58:27 · answer #2 · answered by gudspeling 7 · 0⤊ 0⤋
One car is going 20 mph and the other is going 30 mph
They are traveling towards each other.
The distance between them is 60 miles
The distance is closing between them at a rate of 50 (20 + 30) mph.
time = distance / speed
T = 60 / 50 = 1.2 hours = 1 hour 12 minutes
2007-07-23 21:01:09 · answer #3 · answered by Anonymous · 0⤊ 0⤋
1hr and 12 mins.
In one hour, 50 of the 60 miles will be covered (30 +20), which is 5/6 the distance. So, the remaining 1/6 of the distance must take 1/5th of that time.
2007-07-23 21:01:58 · answer #4 · answered by dpilipis 4 · 0⤊ 0⤋
Car A speed = 20 mph -->
Car B speed = 30 mph <---
Relative speed of faster car to slower car is 50mph
t = 60 / 50 h
t = 6 / 5 h
t = 1 h 12 min
2007-07-24 05:02:22 · answer #5 · answered by Como 7 · 0⤊ 0⤋
the cars are headed towards each other at a rate of 50 mph. they are 60 miles apart, so the time is 60/50 = 1.2 hours = 1 hour 12 minutes
2007-07-23 20:59:29 · answer #6 · answered by holdm 7 · 0⤊ 1⤋
It will take one hour for them to meet. Here's how: In one hour, car A will go 40 miles. Car B will go twenty miles. So:
40 + 20 = 60
60 = miles away from each other.
Therefore, it will take one hour for them to meet.
Sincerely,
Young Einstein
2007-07-23 20:57:05 · answer #7 · answered by Young Einstein 3 · 0⤊ 1⤋
1 hour 12 minutes
2007-07-24 00:19:42 · answer #8 · answered by Nick 2 · 0⤊ 0⤋
1
because the speed of the first 20mph and the second 40mph equal 60mph and the distance is 60 miles
2007-07-23 20:57:24 · answer #9 · answered by lexi 3 · 0⤊ 0⤋
1 hour
2007-07-23 21:00:41 · answer #10 · answered by Anonymous · 0⤊ 0⤋