65. The area of ranches 1,2 and 3 are 10/3 , 10 and 24 acres, respectively, where grass grows at constant rates. The first 1st ranch can sustain 12 oxen for 4 weeks . The 2nd ranch can sustain 21 oxen for 9 weeks . For how many weeks will the 3rd ranch sustain 36 oxen? (A) 36 (B) 18 (C) 12 (D) NONE OF THESE

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Solve the following.

If 8 oxen can plough 45 acres of land in 15 days, then how many acres of land can 12 oxen plough in 9 days?

A

B

C

A

10

7

B

12

5

C

15

3

175

C

$4$ oxen or $12$ cows can graze a field in $32$ days. How long would $7$ oxen and $3$ cows take to graze the same field?

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