RRB NTPC Mains or Stage 2 Model Paper 4 with solutions

Question : 36 of 120

Marks: +1, -0

10 horses and 15 cows eat grass of 5 acres in a certain time. How many acres will feed 15 horses and 10 cows for the same time, supposing a horse eats as much as 2 cows ?

40/7 acres
39/8 acres
40/11 acres
25/9 acres

Validate

Solution:

(a) 1 horse = 2 cows, 10 horses = 20 cows.⇒ 10 horses + 15 cows = 20 + 15 = 35 cows.
15 horses + 10 cows = 40 cows. Now 35cows eat 5 acres.
⇒40 cows eat 5 ×

40/35 = 55/7

acres.
Here we have converted everything in termsof cows, you can work in terms of horsesalso.

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