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+//Chapter 2, Problem 19

+clc;

+P1=3000;                //power in watts

+P2=150;                 //power in watts

+t1=20;                  //time in hours

+t2=30;                  //time in hours

+n1=2;                   //no of fires

+n2=6;                   //no of light

+m=14;                   //cost per unit

+E1=P1*t1;

+w1=n1*E1;

+E2=P2*t2;

+w2=n2*E2;

+T=w1+w2;

+c=m*(T/1000);

+printf("\nIf the cost of electricity is 14 p per unit\n")

+printf("\n the weekly cost of electricity to the business = %f p",c);

+printf("\n\t\t\t\t\t\t= %.2f euro",c/100);