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.