Q 11-01-238NEETNEET 2022Top questionEasy
The area of a rectangular field (in $\text{m}^2$) of length $55.3$ m and breadth $25$ m after rounding off the value for correct significant digits is
Answer: (A) $14 \times 10^2$
$55.3 \times 25 = 1382.5\ \text{m}^2$.
In a product, the result keeps as many significant figures as the least precise factor: $25$ has two. Rounded to two significant figures, $1382.5 \approx 1.4 \times 10^3 = 14 \times 10^2\ \text{m}^2$.
Solution by Sreeraj P, M.Sc Physics