A can complete the work in 7 days, B can complete the same work in 9 days, C can complete the same work in 5 days. when A B C do this work together. then how many days will take to complete the work.
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Answer:
15
Step-by-step explanation:
efficiency of A ,B and C= 7+9+5
Total Work = 7*9*5
Together No of Days= Total Work/efficiency of A ,B and C
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