Rajesh measures the length of a box to be $30.5 c m$ using a scale that has a broken left end. The actual length of the box is $29 c m$ . What is the zero error?

0.5 cm

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1.5 cm

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0.05 cm

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1 cm

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Solution

The correct option is B 1.5 cm
Zero error is the error that occurs when the length of an object is measured using a scale that has a damaged zero mark or broken left end.

Given,
Actual value = $29 c m$ ,
Measured value = $30.5 c m$ .

Zero error = Measured value - actual value
Zero error = $30.5 c m - 29 c m = 1.5 c m$

Thus, the zero error is 1.5 cm

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Rajesh measures the length of a box to be 30.5 cm using a scale that has a broken left end. The actual length of the box is 29 cm. What is the zero error?

Rajesh measures the length of a box to be $30.5 c m$ using a scale that has a broken left end. The actual length of the box is $29 c m$ . What is the zero error?