A and b can complete the work in 20 days and 30 days respectively. A and b start working together.After some days b leave thw work. And the work is completed in 16 days. In how many days b left the work?
Answers
Answered by
1
Hey Dude
A can complete 1 work in 30 days so 1 days work = 1/30
B can complete 1 work in 20 days , so 1 days work =1/20
they started together and B leaves 5 days before completion of work
so last 5 days done by A alone .
this can be formulated as [(1/30) +(1/20)]x + (1/30)*5 =1
(Here x is the no of days working together )
so by solving this we can get the ans
(5/60)x+(1/6)=1
so x=10
total days =x+5
10+5=15
May be it helps u
A can complete 1 work in 30 days so 1 days work = 1/30
B can complete 1 work in 20 days , so 1 days work =1/20
they started together and B leaves 5 days before completion of work
so last 5 days done by A alone .
this can be formulated as [(1/30) +(1/20)]x + (1/30)*5 =1
(Here x is the no of days working together )
so by solving this we can get the ans
(5/60)x+(1/6)=1
so x=10
total days =x+5
10+5=15
May be it helps u
Similar questions