To maintain 8 cows for 60 days a milkman has to spend 6 400 To maintain 5 cows for n days he has to ...........

Quantitative Aptitude (CDS) Time and work

To maintain 8 cows for 60 days, a milkman has to spend ? 6,400. To maintain 5 cows for n days, he has to spend ?4,800. What is the value of n?

46 days

50 days

58 days

72 days

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Explanation:

To maintain M1 cows for D1 days a milk man spends W1 and to maintain M2 cows for D2 days, a milk man spend W2
$Then\: \frac{M1D1}{W1}=\frac{M2D2}{W2}$
$=>\: \frac{8\times 60}{6400}=\frac{5n}{4800}$
$=>\:n=72$
Hence milk man need 72 days for maintenance Hence option (4)