Four milkmen A, B, C and D hired a pasture. A had 9 cows that graze for 4 months, B had 12 cows that graze for 2 months, C had 14 cows that graze for 5 months and D had 10 cows that graze for 3 months. If A paid Rs.216 then what was the rent of the pasture ? 

960

Let the rent for one cow = Rs.1/pm

Then, rent for each partners = no. of cows × time

            A   :   B   :   C     :   D

No.   :  9    :  12   :  14    :  10

Time :   4   :   2   :   5     :   3  

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 Rent -  36  :  24  : 70    :    30   = 160

So rent paid by A = 36R = 216

1R = 6

Total Rent = 160R = 160 × 6 = Rs.960