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diff --git a/3826/CH5/EX5.22/Ex5_22.sce b/3826/CH5/EX5.22/Ex5_22.sce
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+//the examples are continuously numbered throughout the textbook
+//Example 5_22 page no:313
+clc;
+//given
+len = 12;//in m
+wide = 7.5;//in m
+high = 4.5;//in m
+avg_lumen = 80;//in lumen per square meter
+height = 0.75;//in m
+coeff_uti = 0.3;
+tot_area = len * wide;
+tot_lumen = avg_lumen * tot_area;
+lamp_lumen_req = tot_lumen /coeff_uti;
+//suppose 100 watt lamps are used
+no_of_lamps = lamp_lumen_req / 1340;
+disp(no_of_lamps,"the number of lamps required would be ")
+disp("this can be arranged in 6 rows of 3");
+//suppose 200 watt lamps are used
+no_of_lamps = lamp_lumen_req / 2880;
+disp(no_of_lamps,"the number of lamps required would be ")
+disp("this can be arranged in 3 rows of 3");
+//suppose 80 watt lamps are used
+no_of_lamps = lamp_lumen_req / 2400;
+disp(no_of_lamps,"the number of lamps required would be ")
+disp("this can be arranged in 3 rows of 4");
+tot_energy = 12 * 80;
+disp(tot_energy,"the total energy consumption with the fluorescent lamps is (in W)");
+
diff --git a/3826/CH5/EX5.23/Ex5_23.sce b/3826/CH5/EX5.23/Ex5_23.sce
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+//Example 5_23 page no:330
+clc;
+//given
+height = 15;//in m
+area_ill = 15 * 45;//in m^2
+waste_light_factor = 1.2;
+coeff_uti = 0.4;
+deprication_factor = 1.5;
+tot_lumen = area_ill * 80;
+lumen_output = tot_lumen * waste_light_factor * deprication_factor;
+tot_lamp_lumens = lumen_output / coeff_uti;
+lumen_output_each = 18.9;
+tot_lumen_output = 1000 * lumen_output_each;
+no_of_lamps = tot_lamp_lumens / tot_lumen_output;
+disp(tot_lumen,"the total lumens required on surface is (in lm)");
+disp(lumen_output,"the lumens output from the projector is (in lm)");
+disp(tot_lamp_lumens,"the total lamp lumens is (in lumens)");
+disp(tot_lumen_output,"the total lumens output is (in per lamp)");
+disp(no_of_lamps,"the number of lamps is ");
+disp("the no of lamps is rounded off to 15 or 16");