Question

A, B, C can do a piece of work in 10 days, 15 days, 20 days
respectively. If they work together, then the number of days the
work will be completed in​

Answer 1

Answer:

About 6 days

Step-by-step explanation:

A's work in one day = 1/10

B's work in one day = 1/15

C's work in one day = 1/20

Combined work in one day = 1/10 + 1/15 + 1/20

= 6/60 + 4/60 + 3/60

= 13/60

= about 6 days