Question

In a farm there are cows and hens. If heads are counted there are 180, if legs are counted there are 420. The number of cows in the farm is

Answer 1

Answer:

let the no cows is x

and the no. of hen is y

x+y=180--i

4x+2y=420--ii(cows have 4 legs,hens have 2 legs)

i×2-ii

2x+2y=360

4x+2y=420

cancelled 2y

-2x=-60

x=30

cows are 30 hens are 150

Answer 2

Answer:

C+H=180............(1)

4C+2H=420..........(2)

4C+2H=420

2C+2H=360

....................

2C. =060

C=30

if C value substitute in eq1

30+H=180

H=150

Step-by-step explanation:

Hens are 150

Cows are 30

Hope it helps you