Q14---------------15 men could finish a piece of work in 210 days.But at the end of 100 days ,15 additional men are employed.In how many more days will the work be complete.
a. 80 days
b. 60 days
c. 55 days
d. 50 days
2007-07-04 12:24:12 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
If it takes 15 men 210 days, then each man does 1/3150 of the work per day.
15 men at the end of 100 days would have finished 1500/3150, leaving 1650/3150 to be done.
30 men would complete 1650/3150 of the work in 1650/30 days, which is 55. Answer (c).
2007-07-04 12:37:01 · answer #1 · answered by McFate 7 · 0⤊ 0⤋
15 men took 210 days
therefore
1 man requires 15 x 210 = 3150 days to complete the same work
therefore in 1 day 1 man complete 1/3150 of the total work
therefore
in 100 days 15 men completes (15 x 1/3150 x 100) = 10/21 of the total work
After 100 days there are 30 men
they will complete the remaining task i.e. 1 - 10/21 of the total work in 1/30 x 11/21 x 3150 = 55 days
2007-07-04 15:28:49 · answer #2 · answered by ? 1 · 0⤊ 0⤋
55 days
2007-07-06 00:08:25 · answer #3 · answered by aditi 2 · 0⤊ 0⤋
55 days
2007-07-04 22:51:45 · answer #4 · answered by ? 2 · 0⤊ 0⤋
55 days
2007-07-04 12:30:25 · answer #5 · answered by Anonymous · 0⤊ 0⤋
15 men take 210 days to complete the job then it take 3150 (15*210) mandays to complete the job.
After 100 days with 15 men working the job has taken 1500 mandays so far.
There are another 1650 (3150-1500) mandays needed to complete the job.
With 30 men now working it will take another 55 days(1650/30) to complete the job
Answer (c) is correct.
2007-07-04 12:30:49 · answer #6 · answered by Anonymous · 0⤊ 0⤋
55 DAYS.
2007-07-05 19:53:07 · answer #7 · answered by Anonymous · 0⤊ 0⤋
hey thats a tough one...wat year are u in...seriously
well i asked my dad and he said 55
2007-07-04 12:40:30 · answer #8 · answered by Anonymous · 0⤊ 0⤋