Question

9. A and B can do a piece of work in 30 days; B and C in 24 days; C and A in 40 days. How long will
it take them to do the work together?
In what time can each finish it, working alone?​

Answer 1

Step-by-step explanation:

A+B=30

B+C=24

C+A=40

Taking LCM of 30,24and40=120

A+B=4

B+C=5

C+A=3

4+5+3=12

120/12=10

Because there are A,B and C are present twice.

So 10×2=20 is the answer

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