Rohit can do a work in 30 days , Saif in 45 days and Rahul in 60 days . If Rohit is helped by Saif and Rahul every 3rd day , how long will it take for them to complete the work ?
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Answer:
Step-by-step explanation:
divide these days by 3
30/3+45/3+60/3=10+15+20=45 days
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