SOLUTION: A group of men can do a job in as many as thre are men in the group. If the number of men are increased by 5, the no. of days to do the job will be decreased by 4. Find the number

Algebra ->  Human-and-algebraic-language -> SOLUTION: A group of men can do a job in as many as thre are men in the group. If the number of men are increased by 5, the no. of days to do the job will be decreased by 4. Find the number       Log On


   

Question 23378: A group of men can do a job in as many as thre are men in the group. If the number of men are increased by 5, the no. of days to do the job will be decreased by 4. Find the number of men in the group...i really need your help!!!
Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
A group of men can do a job in as many as there are men in the group. If the number of men is increased by 5, the number of days to do the job will be decreased by 4. Find the number of men in the group. Thanks!
1 solutions
Answer 11344 by venugopalramana(581) About Me on 2005-12-19 11:17:56 (Show Source):
LET X PEOPLE DO THE JOB IN X DAYS....SO IN ONE DAY X PEOPLE CAN DO 1/X JOB...OR..1 PERSON CAN DO IN ONE DAY 1/(X)^2 JOB
5 MORTE MEANS X+5 PEOPLE........X+5 CAN DO IN ONE DAY (X+5)/(X)^2 JOB ...HENCE HEY REQUIRE (X)^2/(X+5) DAYS TO DO 1 JOB..BUT THIS IS GIVEN AS EQUAL TO 4 LESS DAYS OR X-4 DAYS.
(X)^2/(X+5)=X-4
X^2=(X+5)(X-4)=X^2+5X-4X-20
X^2-X^2+X-20=0
X-20=0
X=20...