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Bhuvan has some hens and some cows. If the total number of animal-heads are 71 and the total number of feet are 228, how many hens does Bhuvan have ?(a) 43 (b) 32(c) 24(d) Cannot be determined(e) None of these |
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Answer» (e) Let Bhuwan have x hens and y cows According to the question, x + y = 71 ...(i) 2 x + 4y = 228 ...(ii) Multiply equation (i) by 4 and subtract equation (ii) from it : 4x + 4y – 2x – 4y = 284 – 228 or, 2x = 56 or, x= 56/2 =28 Number of hens = 28 |
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