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Question

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?

A
1 cm
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B
0.5 cm
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C
0.05 cm
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D
1.5 cm
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Solution

The correct option is D 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 cm,
Measured value = 30.5 cm.

Zero error = Measured value - actual value
Zero error = 30.5 cm29 cm=1.5 cm

Thus, the zero error is 1.5 cm

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