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+//Chapter-18,Example 2,Page 405
+clc();
+close();
+
+W1 = 2.5     //weight of coal
+
+W2 = 2.415   //weight of coal after heating at 110 C
+
+W_res= 1.528  //weight of residue
+
+W_ash= 0.245    //weight of ash
+
+Mois= W1-W2    //moisture in sample
+
+per_M=Mois*100/W1
+
+printf("the percentage of moisture is %.2f ",per_M )
+
+VCM=W2-W_res  //amount of VCM in sample
+
+per_VCM=VCM*100/W1
+
+printf("\n the percentage of VCM is %.2f ",per_VCM )
+
+per_ash=W_ash*100/W1
+
+printf("\n the percentage of ash is %.2f",per_ash )
+
+Fix_C= W_res-W_ash  //fixed carbon
+
+per_fix=Fix_C*100/W1
+
+printf("\n the percentage of fixed carbon is %.2f",per_fix )
+
+//mistake in textbook