1.

11. A, B and C can do a job in 12 h. 20 h and 30 h respectively. If they all work together, howlong will they take to complete the job?​

Answer»

Answer:

20 hours 36 minutes

Step-by-step EXPLANATION:

MEAN = 12+20+30

--------------

3

= 62

-----

3

= 20.6

1 hour = 60 minutes

60÷10=6minutes

Let the number multiplied be x

Therefore, 6x= 6 × 6 = 36 minutes

20.6x = 1 × 20 + 36 = 20 hours 36 minutes



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