xml - How to select a value using Xpath -

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i new xml , struggling find answer problem. have following code (see below) , extract value 3400.0000000000 it.

how do using xpath?

<spindlespeed dataitemid="c2" name="sspeed" sequence="351828725" subtype="actual" timestamp="2014-12-01t21:51:32.834494">3400.0000000000</spindlespeed>

try :

//spindlespeed/text()

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