Question

The length of a rectangular plate is measured by a metre scale and is found to be 10.0cm its width is measured by vernier calipers as 1.00cm the least count of the metre scale and vernier calipers are 0.1cm and0.01cm respectively. Find maximum permissible error in area?

Answer 1

L(length)=10.0
B(width)=1
dL= 0.1
dB= 0.01

Area(A)=LxB= 10.0x1=10

dA/A = dL/L+dB/B
dA/10 = 0.1/10+0.01/1
dA/10 = 0.01+0.01
dA/10 = 0.02
dA = 0.02 x 10
dA = 0.2 cmsq.

-Regards Deepak Mehra
Aakash Institute South Ex New Delhi
RM-31 (2018-19)

Answer 2

Answer:

plus minus 0.2 cm^2 is answer of this question.....