Question

The length and breadth of a thin rectangular sheet, measured using a metre scale, are 18.2 cm and 14.5 cm respectively.
Find the uncertainty or error in the estimation of the area of the rectangular sheet.

Answer 1

@UnkleRhaukus @hartnn

Answer 2

@harsh314

Answer 3

18.2 +/-0.1 or 14.5+/- 0.1
that's the least count

Answer 4

Yes but my small (may be silly) , why 0.1 there?

Answer 5

because the least count of meter scale is 0.1 cm

Answer 6

Yes I got it now... thanks @hartnn

Answer 7

So it will be :
\[\large{\frac{0.1}{18.2}\pm \frac{0.1}{14.5}}\]

Answer 8

as :
\[\large{\delta Z = \frac{\delta A}{A} +\frac{\delta B}{\B}}\]

Answer 9

\[\large{\delta Z = \frac{\delta A}{A} +\frac{\delta B}{B}}\]

Answer 10

correct ? As we were talking about multiplication so the applied formula will be mentioned above

Answer 11

not sure what u wrote is correct(dimensions not matching).....which reference did u use ?

Answer 12

Let me check wait.