How Long would they Take Complete a Job?

Arvind is thrice as efficient as Vijay and Vijay is twice as efficient as Kamal. If Arvind, Vijay and Kamal work together, how long would they take to complete a job that Vijay takes 10 days to complete?

  1. 11/20 days
  2. 20/9 days
  3. 11/9 days
  4. 9/11 days
Monis Rasool Professor Asked on 26th May 2015 in Maths.
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  • 1 Answer(s)

    Answer: (b) 20/9 days
    Explanation:-
    According to question,
    Arvind is thrice as efficient as Vijay means, A = 3V
    and Vijay is twice as efficient as Kamal means, V = 2K
    Vijay complete a job = 10 days
    then, Kamal complete this job = 2 x 10= 20 days
    and Arvind complete this job = 10/3 days

    Arvind, Vijay and Kamal together work in a day = 3/10 + 1/10 + 1/20
    = (6 + 2 + 1)/20
    = 9/20

    Hence, Arvind, Vijay and Kamal together complete the job = 20/9 days

    Anurag Mishra Professor Answered on 28th May 2015.
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