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diff --git a/1553/CH16/EX16.6/16Ex6.sce b/1553/CH16/EX16.6/16Ex6.sce
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+//chapter 16 Ex 6
+clc;
+clear;
+close;
+//let pipes be A B and leak be C
+t1=14; t2=16; //time taken by A and B to fill cistern individually
+t3=32/60;
+A1hour=1/t1; B1hour=1/t2; //part filled by A and B in 1 hour each
+AB1hour=A1hour+B1hour;
+
+ABC1hour=1/(1/AB1hour+t3);           //part filled by all 3 pipes in 1 hour
+C1hour=AB1hour-ABC1hour;    //part emptied by C in 1 hour
+
+mprintf("Thus the leak empties the cistern in %.0f hours",1/C1hour);