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A man has some hens and cows. if the number of heads be 48 and the number of feet equals 140, then the number of hens will be:
- 22
- 23
- 24
- 26
Lets suppose common in both
x+y=48
And legs are
4x+2y=140
Hens have 2 legs so we will find value of y
4(48-y)+2y=140 :get value of x from x+y=48
192-4y+2y=140
-4y+2y=140-192
-2y=-52
y=26