The diameter of a wheel is 63 cm . The distance travelled by the wheel in 100 revolutions is:\

Question

Professor PC Thomas Classes · Answer

(b) : Given, diameter of wheel $=63 \mathrm{~cm}$\ $\quad$ Radius, $r=\frac{63}{2}=31.5 \mathrm{~cm}$\ Distance travelled by the wheel in one revolution $$ =2 \pi r=2 	imes \frac{22}{7} 	imes \frac{63}{2}=198 \mathrm{~cm} $$ ∴ Distance travelled by the wheel in 100 revolutions $$ =198 	imes 100 \mathrm{~cm}=\frac{198}{100} 	imes 100 \mathrm{~m}=198 \mathrm{~m} $$