work formula
A can do a work in x days
then A's work rate( work done per day)= 1/x
B do a work in y days then
B's work rate=1/y
1. A+B work per day= 1/x+1/y =(x+y)/xy
A+B will finish work in = xy/(x+y) days
2. A can alone finish the work in p days and b can finish it in q days. then if A alone work for x days and B work for next y days then work would complete in
pq/(qx+py)
3. If A+B finish a work in x days, B+C in y and C+A in z days
then
A+B+c can finish it in
A+B+C=2xyz/(xy+yz+xz)
A can finish the work alone in
A=2xyz/(xy+yz-xz)
B can finish the job alone in
B=2xyz/(yz+zx-xy)
C can finish the job alone in
C=2xyz/(xz+xy-zy)
A can do a work in x days
then A's work rate( work done per day)= 1/x
B do a work in y days then
B's work rate=1/y
1. A+B work per day= 1/x+1/y =(x+y)/xy
A+B will finish work in = xy/(x+y) days
2. A can alone finish the work in p days and b can finish it in q days. then if A alone work for x days and B work for next y days then work would complete in
pq/(qx+py)
3. If A+B finish a work in x days, B+C in y and C+A in z days
then
A+B+c can finish it in
A+B+C=2xyz/(xy+yz+xz)
A can finish the work alone in
A=2xyz/(xy+yz-xz)
B can finish the job alone in
B=2xyz/(yz+zx-xy)
C can finish the job alone in
C=2xyz/(xz+xy-zy)
No comments:
Post a Comment