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The external and internal diameters of a...

The external and internal diameters of a hollow cylinder are measured to be `(4.23 pm 0.01)cm ` and `(3.89pm0.01) cm`. The thickness of the wall of the cylinder is

A

`(0.34 pm0.02) cm`

B

`(0.17pm 0.02) cm`

C

`(0.17pm0.02) cm`

D

`(0.34 pm0.01) cm`

Text Solution

Verified by Experts

The correct Answer is:
C
D=(4.32 `pm` 0.01) cm
d=(3.89 `pm` 0.01) cm
`Deltat=(D-d)//2`
`=((4.23pm0.01)-(3.89 pm 0.01))/2`
`=((4.23-3.89) pm(0.01-0.01))/(2)`
`=(0.34 pm 0.02)//2 cm`
`=(0.17 pm 0.01) cm`
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