Question 8323


     Let the No. of pigs = x
     Let the no. of chicken = y

     So, x + y =  220 ...............   (1)  (No. of animals)

        4x + 2y = 700  ..............   (2)  (No. of total legs)
     Eq.(1)*2, we get, 
        2x + 2y = 440  ..............   (3)
     Eq.(2) - (3), we get,
        2x = 340
     So  x = 340/2  =  170

     By replacing the value of x in eq.(1), we get

        170 + y = 220

        y = 220 - 170  =  50

So,  x = 170;  y = 50;  which means 170 pigs and 50 chicken.    Answer

I hope this is clear to you.  



gsm