Substitute: \(31.4 = 2 \times 3.14 \times r\).
Related Articles
- Time to travel 540 miles: \(540 \text{ miles} / 60 \text{ mph} = 9\) hours.
- A circle has a circumference of 31.4 meters. What is its radius?
- Use the formula \(C = 2\pi r\).
- Solve for \(r\): \(r = \frac{31.4}{6.28} = 5\) meters.
- A solution contains 40% alcohol. How much of a 70% alcohol solution must be added to 100 mL of the 40% solution to obtain a 50% alcohol solution?
- Let \(x\) be the amount of 70% solution added.
