Question

The distance covered by a wheel of diameter 42 cm in 2 revolutions is:

• A. \( 264 \) cm
• B. \( 132 \) cm
• C. \( 84 \) cm
• D. \text{None of these}

Hint:

The circumference of a circle is given by: \[ \text{Circumference} = 2\pi r = \pi d. \] Total distance covered in \( n \) revolutions: \[ \text{Distance} = n \times \text{Circumference}. \]

Answer 1

The Correct Option is A

The distance covered by one revolution of the wheel is equal to its circumference:
\[ \text{Circumference} = \pi d = \pi \times \] \[ = 132 \text{ cm}. \] For two revolutions:
\[ \text{Distance} = 2 \times 132 = 264 \text{ cm}. \]