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diff --git a/608/CH21/EX21.16/21_16.sce b/608/CH21/EX21.16/21_16.sce
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+//Problem 21.16: Determine the torque developed by a 350 V d.c. motor having an armature resistance of 0.5 ohm and running at 15 rev/s. The armature current is 60 A.
+
+//initializing the variables:
+V = 350; // in Volts
+Ra = 0.5; // in ohms
+n = 15; // in rev/sec
+Ia = 60; // in Amperes
+
+//calculation:
+//Back e.m.f. E = V - Ia*Ra
+E = V - Ia*Ra
+//torque T = E*Ia/(2*n*pi)
+T = E*Ia/(2*n*%pi)
+
+printf("\n\n Result \n\n")
+printf("\n the torque exerted is %.1f Nm ",T)
+\ No newline at end of file