Question

A bicycle wheel having a radius of 35 cm. What percentage of its circumference is covered in a quarter turn? ( Use T=22/7)

• A. 15%
• B. 25%
• C. 30%
• D. 35%

Answer 1

Answer:

B. 25%

A quarter turn means the wheel covers one-fourth of its circumference.

Total circumference

$\text{Circumference} = 2\pi r = 2 \times \frac{22}{7} \times 35$
$= 2 \times 22 \times 5 = 220 \text{ cm}$

Distance covered in a quarter turn

$\frac{1}{4} \times 220 = 55 \text{ cm}$

Percentage of circumference

$\frac{55}{220} \times 100 = 25\%$