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. none of these

Hint:

The distance covered in one revolution is equal to the circumference of the wheel, which is \( \pi \times \text{diameter} \).

Answer 1

The Correct Option is A

The distance covered in one revolution of the wheel is equal to the circumference of the wheel. The formula for the circumference is: \[ \text{Circumference} = \pi d, \] where \( d = 42 \) cm. Therefore, the distance covered in one revolution is: \[ \text{Circumference} = \pi \times 42 = 132 \, \text{cm}. \] In 2 revolutions, the distance covered is: \[ 132 \times 2 = 264 \, \text{cm}. \] Thus, the distance covered is \( \boxed{264} \, \text{cm} \).