Question
If Chinky worked for whole time and Arjun & Bheem work
alternatively with Chinky, then what will be the minimum number of required days to complete the work. The ratio of number of days taken by Arjun and Bheem to complete a work individually is 7:8 and the ratio of number of days taken by Bheem and Chinky to complete a work individually is 6:7 and the ratio of number of days taken by Chinky, Danny, Elli and Finn to complete a work individually is 28 : 30 : 35 : 40. Arjun takes 21 days to complete a work individually.Solution
ATQ, we can say that Let 2 days work = 2 × 30 + 40 + 35 = 135 unit 12 days work = 12/2 × 135 = 810 unit Number of days will be minimum when person of higher efficiency work on last day with C, Hence remaining (840 – 810 = 30 unit) work complete by C & A in = 30/(30 + 40) = 3/7 days Total work complete in = (87/7) days
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