A man has some Hens and Cows. If the number of hens is 48 and number of feet is 140. Find the number of Cows.
Number of heads = 48
Number of feet = 140
Let the number of hens be x and the number of cows be y.
Then,
x + y = 48 …(1)
And, 2x + 4y = 140
i.e. x + 2y = 70 …(2)
Subtracting (1) from (2), we get
y = 22
Hence, x = 48 - 22 = 26
Hence, the number of cows is 26.