Posted by Bob on Tuesday, October 16, 2012 at 5:41pm.
if it took 3 people 1 day, each person would be doing 1/3 job/day
It takes 5 days, so a person does 1/15 job/day
4 people can therefore do 4/15 job/day
a whole job will therefore take 15/4 days
Related Questions
Math - Hers is another one: 3 people requires 3 weeks and 2 days to do a job. ...
Math - If a job can be completed by 8 people in 6 days, how many days does it ...
math - Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2...
math - If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do ...
Math - A work crew of 3 people requires 3 weeks and 2 days to do a certain job. ...
Algebra 2 - PLEASE HELP WITH THIS-ITS DUE APRIL 5TH, 2011!!! During a past ...
Math - If it takes 4 people 20 days to build a house, how long does it take 6 ...
Math - If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do ...
math - vanessa can do a job in 12 days. after she has worked for 4 days, she is ...
Algebra - During the last 365 days it was sunny 5 days less than 4 times the ...
For Further Reading
