A wheel has diameter 42 cm; then how far does the wheel go (in meters) in 12 revolutions?
Answer & explanation
Correct answer: option 4
Distance covered by wheel = circumference
= 2 \(\pi \) r or \(\pi \) d
= \(\frac{22}{7}\) × 42 = 132
Total distance = circumference × 12 = 132 × 12 = 1584 = 15.84 m