A does 33.33% as much work as B in five-ninth of the time . They together do it In 15 days .C is 75% as efficient as B . A ,B and C together can do the work in?
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B's 1 day work x
A's 1 day work 33.33x/100=(x/3)*(9/5)=3x/5
Work ratio A:B= 3x/5:x=3x:5x
So day ratio A:B=5x:3x
Atq, 1/5x+1/3x=1/15
X=8
A needs 40 day, B needs 24 days
C is 75% as efficient as B, so C needs 32 days
A,B,C together can do in
1/40+1/24+1/32
47/480
10.21 days(approx.) (ans.)
Please my friend explain it
480/47 days