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Q.

The external and internal diameters of a hollow cylinder are determined with vernier calipers and the result are recorded as 4.23±0.01cm and 3.89±0.01cm . The thickness of the cylinder wall within the limits of error is

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a

0.34±0.04cm

b

0.17±0.01cm

c

0.34±0.02cm

d

0.34±0.01cm

answer is B.

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Detailed Solution

Outer diameter  =4.23±0.01

Inner diameter =3.89±0.01

Thickness 4.23−3.89±0.01+0.01

=0.34±0.02

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