initial commit / add all books

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diff --git a/2471/CH2/EX2.4/Ex2_4.sce b/2471/CH2/EX2.4/Ex2_4.sce
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+clear ;

+clc;

+// Example 2.4

+printf('Example 2.4\n\n');

+printf('Page No. 47\n\n');

+

+// given

+F1= 500*10^3;// fuel oil in gallons

+F2= 500*10^3;// coal in gallons in Pound

+C1= 165*10^3;// cost of oil per year in Pound

+C2= 92*10^3;// cost of an equivalent of coal in Pound

+Ce= 100*10^3;// capital cost of extra handling eqiupment

+

+Cm= (Ce*0.2);// Maintenance , interest costs per year

+As= C1-C2;// Annual Saving in Pound

+printf('Annual Saving is %3.0f Pound\n',As)

+

+if((2*As)> Ce) then

+disp("Replacing an obsolete boiler plant is considerable");

+else

+disp("Replacing an obsolete boiler plant is not considerble");

+end