A man has some hens and cows. If the number of heads be 48 and the number of feet equals 136, then the number of hens will be Pick one:
A) 22 B) 24 C) 26 D) 20 E) 28
28xplanation :   Let number of hens = h and number of cows = c   number of heads = 48   =&gt; h + c = 48 ---(28quation 1)   number of feet = 136   =&gt; 2h + 4c = 136   =&gt; h + 2c = 68 ---(28quation 2)   (28quation 2) - (28quation 1) gives   2c - c = 68 - 48   =&gt; c = 20   Substituting the value of c in 28quation 1, we get   h + 20 = 48   =&gt; h = 48 - 20= 
<gadget id="calculator">48 - 20</gadget>
<output>28</output>
28   i.e., number of hens= 28   Answer : 28
<result>E</result>
A man has some hens and cows. If the number of heads be 48 and the number of feet equals 136, then the number of hens will be