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Q.

The internal and external diameters of a hollow cylinder are measured with the help of a Vernier callipers. Their values are 4.23 ± 0.01 cm and 3.87 ± 0.01 cm, respectively. The thickness of the wall of the cylinder is

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a

0.36±0.02cm

b

0.36±0.01cm

c

0.18±0.01cm

d

0.18±0.02cm

answer is B.

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Detailed Solution

 Thickness =4.23−3.87=0.18  Error =0.01+0.01=0.02  As error always gets added   Thickness =0.18±0.02cm

 

 

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