when you go from point A to point B with a speed of 4 km per hour, you get to point B 1 hour faster than when you move with a speed of 3 km per hour. Find the distance between A and B.
2006-11-19 09:17:11 · 4 answers · asked by Seira T 1 in Science & Mathematics ➔ Mathematics
d=rt.
Let us call the time takes to go from A to B at 4 km/h t.
d =4t
t = d/4.
Let us call the time it takes to go from A to B at 3 km/n u.
d = 3u
u = d/3
So we have d/4+1=d/3
d/12=1
d = 12.
12 km.
2006-11-19 09:24:44 · answer #1 · answered by Texas Cowgirl 3 · 0⤊ 1⤋
The distance is 12 km
2006-11-20 19:01:47 · answer #2 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
x/3-x/4=1
4x-3x/12=1
x=12
thedistance is 12 km
2006-11-19 09:20:00 · answer #3 · answered by raj 7 · 0⤊ 1⤋
4(x-1)=3x
4x-4=3x
-x=4
x=4
3*4=12km
2006-11-19 09:23:28 · answer #4 · answered by Ha!! 2 · 0⤊ 1⤋