Question

Q. If 'A' completes a piece of work in 3
days, which 'B' completes it in 5 days
and 'C' takes 10 days to complete the
same work. How long will they take to
complete the work , if they work
together?​

Answer 1

Answer:

A+B+C

3+5+10

= 18

18 IS THE ANSWER

Answer 2

A’ 1 day work = 1/3

B’s 1 day work = 1/5

C’s 1 day work = 1/10

(A+B+C)’s 1 day work = 1/3 + 1/5 + 1/10

= 19/30

THIS IS THE CORRECT ANSWER