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+//Chapter-17,Example 5,Page 370
+clc();
+close();
+
+v= 50000  //volume of water
+
+m1 = 84    //mass of MgCO3
+
+m2 = 100    //mass of CaCO3
+
+m3 = 95    //mass of MgCl2
+
+m4 = 111    //mass of CaCl2
+
+amnt_1 = 144     //amount of MgCO3 in ppm
+
+amnt_2 = 25     //amount of CaCO3 in ppm
+
+amnt_3 = 95     //amount of MgCl2 in ppm 
+
+amnt_4 = 111     //amount of CaCl2 in ppm
+
+lime = (74/100)*[2*(amnt_1*100/m1)+(amnt_2*100/m2)+(amnt_3*100/m3)]*v
+
+printf("the lime required is = %.3f mg",lime)