Question

I f A and B together can complete a work in 18 days, A and C in 12 days, Band Cin 9 days, then B alone can do it in …….days.​

Answer 1

Answer:

24 days is the correct answer

Step-by-step explanation:

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Answer 2

Answer:

24days

Step-by-step explanation:

A +B =18days

A+C =12days

B+C=9 days

LCM of 18,12&9 is 36

efficiency of A+B = 36/18 = 2 ( eq1

efficiency of A+C= 36/12=3 (eq2

efficiency of B+C 36/9=4 (eq3

add eq 1,2,3

2(A+B+C) =9

A+B+C = 9/2 =4.5

we know efficiency of A+C =3

B+3 =4.5

B=1.5

efficiency of B =1.5

required work days for B, =36/1.5

=24days