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प्रश्न
A man has some hens and cows. If the number of heads be 48 and number of feet by 140, how many cows are there?
संख्यात्मक
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उत्तर
Let the number of hens and cow be x and y respectively.
As per the question
x + y = 48 ...(i)
2x + 4y = 140
x + 2y = 70 ...(ii)
Subtracting (i) from (ii), we have
y = 22
Hence, the number of cows is 22.
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