Q. The area of a rectangular field (in $m^2$) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is :
A) $14 \times 10^2$
B) $138 \times 10^1$
C) 1382
D) 1382.5
Explanation
[Solution] 55.3 × 25 = 1382.5; the result must have 2 significant figures (as in 25), giving $14 \times 10^2\ m^2$. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.