Question

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.

Answer 1

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.