The radius of a circular plate is 1.05 m . Its area (in $\mathrm{m}^{2}$ ) up to correct significant

Question

The radius of a circular plate is 1.05 m . Its area (in $\mathrm{m}^{2}$ ) up to correct significant figures is\

Professor PC Thomas Classes · Answer

(a) : Given, radius $r=1.05 \mathrm{~m}$
Area of the circular plate $=\pi r^2=3.14 	imes(1.05)^2$\ $=3.46185 \mathrm{~m}^2$
 Rounding off to three significant figures, area of the circular plate is $3.46 \mathrm{~m}^2$. Closest option is (a).