SOLUTION: twenty men were employed to do some work in a certain time.but when one third of the scheduled time was over,it was found that only one quater of the total work was completed.how m

Question 1086916: twenty men were employed to do some work in a certain time.but when one third of the scheduled time was over,it was found that only one quater of the total work was completed.how many more men should now be employed.how many more men should now be employed to complete the work in three-fourths of the originally schduled time?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
twenty men were employed to do some work in a certain time.
but when one third of the scheduled time was over,it was found that only one quarter of the total work was completed.
how many more men should now be employed.how many more men should now be employed to complete the work in three-fourths of the originally schduled time?
:
let t = the time
let the completed job = 100
:
" one third of the scheduled time was over, it was found that only one quarter of the total work was completed"
t * 20 = *100
= 25
20t = 25 * 3
20t = 75
t = 75/20
t = 3.75 hrs
find how many man-hrs to complete the job
3.75 *20 = 75 man-hrs
"how many more men should now be employed to complete the work in three-fourths of the originally scheduled time?"
* 3.75 = 2.8125 hrs is 3/4 of the scheduled time
let m = no. of additional men
2.8125(m+20) = 75
2.8125m + 56.25 = 75
2.8125m = 75 - 56.25
2.8125m = 18.75
m = 18.75/2.8125
m = 6.667 ~ 7 more men required
:
:
Check this
* 3.75 * 27 ~ 75 man-hrs, a completed job

RELATED QUESTIONS
A team of 30 men is supposed to do a work in 38 days. After 25 days, 5 more men were... (answered by josgarithmetic)

A contractor undertook to do a certain piece of work in 9 days. He employed certain... (answered by ikleyn,Theo,greenestamps,josgarithmetic,Edwin McCravy)

a contractor got a contract to build a building in 30 days and employed 20 men to do the... (answered by ankor@dixie-net.com)

After a certain number of men had been employed on a job for 24 days and had finished... (answered by ewatrrr,josmiceli)

A contractor undertook to build a building in 52 days and employed 24 men to work. Only... (answered by ankor@dixie-net.com,josgarithmetic)

The Puzzle Sara really needed to go to the doctor for her check-up... and to her... (answered by richwmiller)

It was reported in your department meeting that over the past year your hospital... (answered by rothauserc)

An MNC company hired 25 men to do a work in 32 days.After 16 days it employed 5 more men... (answered by richwmiller)

A contractor undertook to build a road in 200 days he employed 140 men after 60 days he... (answered by josgarithmetic,josmiceli,ikleyn,MathTherapy)