Geometry and TrigonometryEasy–MediumTurns of a bicycle wheel over a distance
Geometry and Trigonometry practice question
A bicycle wheel has a radius of 0.35 metres. About how many complete turns does it make in travelling 220 metres? (Use π ≈ 3.14.)
Answer: 100
One turn covers the circumference: 2 × 3.14 × 0.35 ≈ 2.2 m. Turns: 220 ÷ 2.2 = 100.
Common wrong answers
- If you answered 50
- 50 uses a circumference of 4.4 (using the diameter as the radius).
- If you answered 200
- 200 uses the radius as the circumference's… half; 220 ÷ 1.1.
- If you answered 629
- 629 divides 220 by 0.35, ignoring π.
More Geometry and Trigonometry questions
- Easy–Medium
A circle has a radius of 6. What is its area? (Use A = πr².) - Easy–Medium
A right triangle has legs of length 6 and 8. What is the length of the hypotenuse? - Easy–Medium
A circle has a radius of 5. What is its circumference? (Use C = 2πr.) - Easy–Medium
What is the midpoint of the segment joining the points (2, 3) and (8, 11)? - Easy–Medium
What is the measure, in degrees, of angle B? - Easy–Medium
What is the area, in square centimeters, of the trapezoid?
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