Q. The length, breadth and thickness of a block are given by $l = 12cm,\ b = 6\ cm\$and$\ t = 2.45cm$ The volume of block according to the idea of significant figures should be
A) $1 \times 10^{2}\ cm^{3}$
B) $2 \times 10^{2}\ cm^{3}$
C) $1.763 \times 10^{2}\ cm^{3}$
D) None of tehse
Explanation
Volume $V = l \times b \times t$ $= 12 \times 6 \times 2.45 = 176.4\ cm^{3}$ $V = 1.764 \times 10^{2}\ cm^{3}$ Since, the minimum number of significant figure is one in breadth, hence volume will also contain only one significant figure. Hence, $V = 2 \times 10^{2}\ cm^{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.