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A vernier calipers has positive zero err...

A vernier calipers has positive zero error of 0.05 mm. While finding the diameter a cyclinder, the MSR is 9 mm ad the VCD is 9. If the least count of the vernier calipers is 0.1 mm, the area of cross- section of the cylinder is ________ `mm^(2)`

A

76.2

B

19.1

C

23.6

D

26.5

Text Solution

Verified by Experts

The correct Answer is:
A
Zero error = 0.05 mm
` rArr` Zero correction = -0.05 mm
MSR = 9 mm, VCD = 9
L.C = 0.1 mm
Diameter = MSR + (V.C.D) x L.C + Z.C
= 9 mm +9 x 0.1 + (-0.05) = 9.85mm
` therefore ` Radius (R) = ` = (9.85)/(2) mm`
Area of cross section = `pi r^2 = 22/7 ((9.85)/(2))^2`
` = 76.2mm^2`
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