Question

A can do a work in 12 days, B can do the same work in 15 days and C in 20
days. B started the work alone. A joined 3 days after B started the work and
C joined 2 days after A joined. In how many days the work was completed?​

Answer 1

Step-by-step explanation:

mana kaam x din mein pura ho jayega

to sabhi ke dawara kiya gaya kaam

x-3/12+x/15+x-5/20=1

5x-15+4x+3x-15=60

x=90/12