Question

The odometer is a device in a vehicle that measures the number of
kilometers it has traveled. Khoi noted that his odometer was at 56442. The last
digit shows the number of tenth kilometer (it is usually in a different color to the
other digits). After he came back from his office on his bike, the odometer was at
56490. Given that the diameter of the bike’s wheel is 60 centimeters, how many
whole turns did that wheel complete?

Answer 1

Answer:

3500 times the wheel turns whole during the journey