physics
posted by DD .
if a steel flagpole get 5.1 mm taller when temperature increase by 5.0 degree celsius approximately how tall is the flagpole?

Look up the coefficient of thermal expansion of steel. Call it a.
a*L*(deltaT) = 0.0051 meters
Solve for L.
L = 0.0051/(a*deltaT)
"deltaT" = 5 C
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