A and B can do a work in 18days They started together but after 8days A left the work If B does the ...........

Quantitative Aptitude ( CCS) Time and work

A and B can do a work in 18days. They started together but after 8days A left the work. If B does the remaining work in 20days, then in how many days A will do the work alone?

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Explanation:

Solution:
. A+B = 18
Let total work =18
1day work of A & B=1
8days work of A&B =8
remaining =18 -8 =10
B does 10 work in 20days
So 18 work in 36days
A+B= 18
B =36
LCM = 36
A+B= 18……..36/18 =2
B =36………36/36 = 1
So A= 1
So days A = 36/1 = 36