Correct Answer - Option 2 : 20 min
Given:
The diameter of wheel = 3 m
Number of revolutions in 1 min = 28
Distance to cover = 5.280 Km
Concept used:
Distance covered by wheel in 1 rotation = circumference of the wheel
Circumference = π × d
Calculation:
Circumference = π × d
⇒ Circumference = (22/7) × 3 = 66/7 m
Distance covered in 1 min = 28 rotations = 28 × 66/7
⇒ Distance covered in 1 min = 264 m
Distance to be covered = 5.280 km = 5280m
Time taken to cover 5280 m = 5280/264 = 20 mins
∴ Time taken to cover 5.280 km is 20 mins.
