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Q.

If we measure a length I=6.24 cm with the help of a vernier callipers, then which digits are absolutely correct and which is/are doubtful?

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a

6 and 4 are absolutely correct and 2 is doubtful.

b

4 and 2 are absolutely correct and 6 is doubtful.

c

6 and 2 are absolutely correct and 4 is doubtful.

d

6 and 2 are absolutely correct and 6 is doubtful.

answer is C.

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Detailed Solution

6 and 2 are absolutely correct and 4 is doubtful.
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