Question:medium

If the scale arm is not touching the tree stem in caliper measurement, the error in diameter measurement is expressed as one of the following options:

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Think of the geometric relationship: the tilted measurement forms a right-angled triangle where the measured distance is the hypotenuse ($ D \sec e $) and the true diameter is the base ($ D $).
Subtracting the base from the hypotenuse gives the error: $ D(\sec e - 1) $.

Updated On: Jul 28, 2026

$\pm$ (D tane)/2
$\pm$ (L/D) tane $\times$ 100
$\pm$ D (sece-1)
D tane

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The Correct Option is C

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