Raju and tom done a work in 10 days,Tom and appu done a work in 12 days,appu and Raju done a work in 15 days. How many days take if they do that three work together?
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Answer:
8 days
Step-by-step explanation:
(1/10+1/12+1/15)
15/60
1/4
2*4 [ab+bc+ca=2(a+b+c)]
8
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