Question

three men A B C, can do a piece of work in 9 hr ,18 hr and 12hr respectively .how long will they if they work together​

Answer 1

Answer:

72/23

Step-by-step explanation:

Word done by A = 1/9 h

Work done by B = 1/18h

Work done by C = 1/12h

Work done by all three together = A + B + C

                                                      = 1/9 + 1/8 + 1/12

                                                       = (8 + 9 + 6) / 72

                                                       = 23/72

So. the work done by all three is 72/23 (it will be reciprcal of the answer.)

Answer 2

Answer:

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