Question
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100
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A person has some hens and cows. If the number of heads is 48 and the number of legs is 140, find the number of hens.
Correct Option:
A
Explanation
Let hens = H and cows = C.
H+C=48, while 2H+4C=140. Dividing the second by 2 gives H+2C=70. Hence C=22 and H=26.
