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Answer
A=2C
A+B=15
B+C=24
Lcm of 15 and 24 =120
A+B 1 day work=8 -(i)
B+C 1 day work=5-(ii)
Subtracting i and ii
(A+B)-(B+C) =8-5
A+B-B-C =3
A-C =3 (putting value of A=2C)
2C-C =3
C=3
Putting C =3 in eq ii
B+3=5
B=2
B working days= 120/2=60
