Question #191455

. A bicycle has wheels with a diameter of 42cm.

The bicycle is ridden in a straight line at a constant speed. The wheel makes 250

revolutions per minute.

What is the speed of the bicycle in kilometres per hour?

Expert's answer

"v=\\omega r\\\\v=2\\pi(250)(0.21)\\frac{60}{1000}=19.8\\frac{km}{h}"

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