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+clc;clear;
+//Example 4.14
+
+//given data
+m=90;
+
+//from Tables 4–1 and 4–2
+Ehb=275;//hamburger
+Ef=250;//fries
+Ec=87;//cola
+
+//calculation
+
+//part a
+Ein=2*Ehb+Ef+Ec;
+//The rate of energy output for a 68-kg man watching TV is to be 72 Calories/h
+Eout=m*72/68;
+t=Ein/Eout;
+disp(t,'by watching TV in hours');
+
+//part b
+//The rate of energy output for a 68-kg man watching TV is to be 860 Calories/h
+Eout=m*860/68;
+t=Ein/Eout*60//converting in min
+t=ceil(t);
+disp(t,'by fast swimming in mins');
+
+//for last question
+disp('answers be for a 45-kg man energy takes twice as long in each case');