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diff --git a/797/CH3/EX3.12.s/3_12_solution.sce b/797/CH3/EX3.12.s/3_12_solution.sce
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+//Solution 3-12
+WD=get_absolute_file_path('3_12_solution.sce');
+datafile=WD+filesep()+'3_12_example.sci';
+clc;
+exec(datafile)
+a_x = (V_1 - V_0) / t; //acceleration = rate of change of velocity  (horizontal)
+a_x = a_x / 3.6 //converting acceleration to [m/s^2]
+theta = atan(a_x / (g + a_z)) //angle made by free surface of water with horizontal [radians]
+printf("Vertical rise at the back of the tank relative to the midplande is")
+//Case 1:
+deltaz_1 = b_1 / 2 * tan(theta);
+printf("\n1.For long side parallel to direction of motion =%1.2f cm", deltaz_1 * 100);
+//Case 2:
+deltaz_2 = b_2 / 2 * tan(theta);
+printf("\n2.For short side parallel to direction of motion =%1.2f cm", deltaz_2 * 100);
+if(deltaz_2 < deltaz_1)
+    printf("\n Hence short side must be parallel to the direction of motion.");
+else
+    printf("\n Hence long side must be parallel to the direction of motion ");
+end