Question 12 Marks
The diameter of a cycle wheel is $4 \frac{5}{11} cm$. How many revolution will it make in moving $6.3\ km$ ?
Answer
View full question & answer→$\text { Diameter }=4 \frac{5}{11} cm =\frac{49}{11} cm$
$\text { circumference }=2 \pi r =\pi d $
$=\frac{22}{7} \times \frac{49}{11} $
$=14\ cm$
Circumference $=14 cm =0.14 m$
Distance travelled $=6.3 km =6300 m$
No. of revolutions $=\frac{6300}{0.14}=45000$
Wheel takes $45000$ revolutions in moving $6.3 km$
$\text { circumference }=2 \pi r =\pi d $
$=\frac{22}{7} \times \frac{49}{11} $
$=14\ cm$
Circumference $=14 cm =0.14 m$
Distance travelled $=6.3 km =6300 m$
No. of revolutions $=\frac{6300}{0.14}=45000$
Wheel takes $45000$ revolutions in moving $6.3 km$