The diameter of a car wheel is 0.6 meters. find the speed of this car at the moment when its wheel makes 10 full revolutions
| September 3, 2021 | education
The diameter of a car wheel is 0.6 meters. find the speed of this car at the moment when its wheel makes 10 full revolutions in one second. Express your answer in km / h, rounded to the nearest whole number.
In order to find the speed, you need to find the circumference of the wheel, which is 0.6 * π meters.
Since, according to the condition of the problem, the wheel makes 10 full revolutions in one second, then it makes 60 * 60 * 10 = 36000 revolutions per hour.
Then the speed of this car is 36000 * 0.6 * π = 67824 m / h = 67.824 km / h.
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