Question
Raj, Sanjay and Vaibhav can separately finish a work in
20, 30 and 40 days, respectively. In how many days Raj can finish the work if he is assisted.by Sanjay and Vaibhav and alternates days starting with Sanjay.Solution
RajSanjayVaibhav 203040 120 643 Working type – (Raj+ Sanjay) (Raj +Vaibhav) Working in first 2 days =10+9=19unit Working in 2×6=12 days =19×6=114unit 13days-6/10=3/5 Total time =12+3/5=63/5days
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