TIME AND WORK
* If A can do a piece of work in n days , then A's 1 day work =1/n
* If A's 1 day work =1/n, then A can finish a work in =n days
* If A is thrice as good workman as B,then: Ratio of work done by A and B =3:1. Ratio of time taken by A and B to finish a work=1:3
* If A can finish work in X time and B can finish work in Y time
then both together can finish work in (X*Y)/ (X+Y) time.
* If A can finish work in X time and A and B together can finish
work in S time then B can finish work in (XS)/(X-S) time.
* If A can finish work in X time and B in Y time and C in Z time
then they all working together will finish the work in
(XYZ)/ (XY +YZ +XZ) time
* If A can finish work in X time and B in Y time and A,B and C
together in S time then :
---->C can finish work alone in (XYS)/ (XY-SX-SY)
---->B+C can finish in (SX)/(X-S)
---->A+ C can finish in (SY)/(Y-S)
* If A can do a piece of work in n days , then A's 1 day work =1/n
* If A's 1 day work =1/n, then A can finish a work in =n days
* If A is thrice as good workman as B,then: Ratio of work done by A and B =3:1. Ratio of time taken by A and B to finish a work=1:3
* If A can finish work in X time and B can finish work in Y time
then both together can finish work in (X*Y)/ (X+Y) time.
* If A can finish work in X time and A and B together can finish
work in S time then B can finish work in (XS)/(X-S) time.
* If A can finish work in X time and B in Y time and C in Z time
then they all working together will finish the work in
(XYZ)/ (XY +YZ +XZ) time
* If A can finish work in X time and B in Y time and A,B and C
together in S time then :
---->C can finish work alone in (XYS)/ (XY-SX-SY)
---->B+C can finish in (SX)/(X-S)
---->A+ C can finish in (SY)/(Y-S)
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