A wheel makes 1000 revolutions in covering a distance of 88 km. The diameter of the wheel is -
A
28m
B
40m
C
14m
D
10m
Correct Answer: 28m
A distance equal to the circumference of the wheel is covered in each revolution. So, 1000 x circumference = total distance or, 1000 x 2πr = 88000 [in meter] or, 2r = 88000 / (1000 x π ) or, diameter = 28 m