A and B together can finish a work in 12days if A alone can finish the same work in 20days in how many days B alone can finish it
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Answer:
B will complete the work in 30 days
Step-by-step explanation:
A alone can finish the same work in 20 days
means A does 1/20 th work per day
when both complete the work in 12 days
A completes 12 /20 th work in 12 days
So the work done by B = 1 - 12 /20 = 8/20 = 2/5
Therefore
in on day B will complete( 2 /5 ) ÷12 = 2/60 = 1/30
So B will complete the work in 1 ÷ 1/30 = 30 days
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