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diff --git a/3648/CH9/EX9.11/Ex9_11.sce b/3648/CH9/EX9.11/Ex9_11.sce
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+//Example 9_11
+clc();
+clear;
+//To find out what horsepower is required
+p=1.29  //Units in Kg/Meter^3
+Cd=0.45
+af=2   //Units in Meter^2
+v=20   //Units in meters/sec
+M=1000   //units in Kg
+F=(0.5*p*Cd*af*v^2)+((M/1000)*((110+(1.1*v))))   //Units in Newtons
+Power=F*v   //Units in Watts
+Power=Power/747.3061     //units in Horse Power
+reqHPower=Power^2   //unis in Horse power
+printf("The required power is=%d hp",reqHPower)
+//In text book the answer is printed wrong as 80 Hp the correct answer is 95Hp
diff --git a/3648/CH9/EX9.11/Ex9_11.txt b/3648/CH9/EX9.11/Ex9_11.txt
new file mode 100644
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+The required power is=95 hp 
+\ No newline at end of file