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diff --git a/3886/CH2/EX2.12/2_12.txt b/3886/CH2/EX2.12/2_12.txt
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+++ b/3886/CH2/EX2.12/2_12.txt
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+ --> //Determine reactions at contact
+--> //Refer fig.2.16(b)
+--> //applying Lami's Theorem
+--> R1=400*sind(180-45)/sind(60+45)  //N
+ R1  = 
+
+   292.82032
+--> R2=400*sind(180-60)/sind(60+45)  //N
+ R2  = 
+
+   358.63019
+--> printf("The reactions developed are:-\nR1=%.1f N \nR2=%.1f N",R1,R2)
+The reactions developed are:-
+R1=292.8 N 
+R2=358.6 N
+\ No newline at end of file