A wheel makes 1000 revolutions in covering a distance of 88 km. The diameter of the wheel is -

A wheel makes 1000 revolutions in covering a distance of 88 km. The diameter of the wheel is - 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
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