Question

solve the problem...​

Answer 1

Time taken :

A = (1+60%)(A+B)

=1.6 (A+B)

A:(A+B) = 1.6 =5:3

B+C = 13 1/3 days

Efficiency :

A+B :A = 5:3

3 *(A+B)=5A

3B =2A

A:B =3:2

C =2B

let work done by B in one day = 1/b

then work done by C = 2/b

work done by B+C in one day = 1/(13 1/3) = 3/40

1/b +2/b = 3/40

3/b = 3/40

2/b= 1/c = 2/40 =1/20

c = 20 days

b =40 days

B takes 40 days to finish the work, so A takes 3/5×40 = 24 days

work done by A+B in one day

=1/24 +1/40 = 5+3/120 =8/120 =1/15

A+B takes 15 days