a wheel has a diameter of 58 cm. how far he has cycled when the wheel rolled 1000times . How should I answer in km with a decimal?

Question

a wheel has a diameter of 58 cm. how far he has cycled when the wheel rolled 1000times . How should I answer in km with a decimal?

 

with a boat takes 30 minutes from one place to place. boat speed is 10 knots. a knot is 2km per hour. How long is the distance between the locations on a map in an appropriate scale.?

Answer 1

First we need to find the circumference of the wheel so we can determine how far the wheel travels with each rotation. To find circumference from diameter, simply multiply the diameter by pi. 58cm x 3.14159 = 182.2124cm

If the wheel rolled 1,000 times, we need to multiply our circumference by number of rotations. 182.2124cm x 1,000 = 182,212.374cm

Next, we need to convert cm to km for the final answer. 182,212.374cm x 1km/100,000cm = 1.82km