Question 1142589
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He thinks he is selling the pipe for 140% of his wholesale cost, but he is only selling it for 139% of the wholesale cost, because the meter stick is not accurate.  So he is selling the pipe for 139/140 of what he thinks he is selling it for.<br>
That means the meter stick is TOO LONG by a factor of 140/139.<br>
So the meter stick is actually 140/139 meters long.<br>
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140/139 = 1.00719  to 5 decimal places<br>
So the stick is too long by about 0.00719 meters, or 7.19 mm.