8 men took 12 days to repair a road 4km long.
How long would it take 6 men to repair 1km of road?
2007-06-19 15:14:07 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
4 days
2007-06-19 20:49:41 · answer #1 · answered by Prithika 2 · 0⤊ 3⤋
lets look at the first statement. 8 men take 12 days to repair a 4km road.
Therefore 8 men would take 12/4 = 3 days per km.
6 men would then take (8*3)/6 = 4 days per km.
Ans: 4 days
2007-06-19 15:20:24 · answer #2 · answered by mathnerd 2 · 0⤊ 0⤋
The repair rate per man-day is:
length / (men * days) =
4km/(8*12) =
1/24 km per man per day.
Now, if we have 6 men, and 1km to repair, use the same equation, and the rate computed above, to solve for the number of days:
1/24 = length / (men * days)
1/24 = 1 / (6 * d)
d/24 = 1/6
d = 4
So it will take 4 days for 6 men to repair 1km of road.
2007-06-19 15:17:14 · answer #3 · answered by McFate 7 · 2⤊ 0⤋
4 days
2007-06-19 15:17:31 · answer #4 · answered by Maya's_Mama 3 · 0⤊ 1⤋
Who's going to help you when you get into the real world?
2007-06-19 15:19:34 · answer #5 · answered by Anonymous · 0⤊ 1⤋