Question
Mukesh has some goats and hens in his shed. Upon counting, Mukesh found that the total number of legs is 112 and the total number of heads is 40. Find the number of hens in his shed.
Hint:
let no. of hens be x and no. of goats be y .
Total no. of legs = No. of legs for x hens + No. of legs for y goats = 112
Total no. of heads = No. of heads for x hens + No. of head for y goats = 40
The correct answer is: 24
Ans :- There are 24 hens in the shed
Explanation :-
let no. of hens be x and no. of goats be y .
No. of legs for each hen = 2 ;No. of legs for each goat = 4
No. of heads for each hen = 1 ;No. of heads for each goat = 1
Step 1:- Form the equation based on given conditions
Total no. of legs = No. of legs for x hens + No. of legs for y goats = 112
x No. of legs for each hen + y No. of legs for each goat = 112
— Eq1
Total no. of heads = No. of heads for x hens + No. of head for y goats = 40
x No. of heads for each hen + y No. of heads for each goat = 40
—Eq2
Step 2:- eliminate y to find x
Doing 2(Eq2) -(Eq1)
∴x = 24
∴There are 24 hens in the shed
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