**Q1: **

Work out the radius of a circle with a circumference of 19 inches, giving your answer to two decimal places.

**Q2: **

Suppose you walk around the edge of a circular fountain and measure its circumference to be 316 feet. Based on your measurement, what is the diameter of the fountain rounded to the nearest unit?

**Q3: **

Half the circumference of a certain circle is 392.5 cm. Determine its diameter, using 3.14 in place of .

**Q4: **

Half the circumference of a certain circle is 863.5 cm. Determine its diameter, using 3.14 in place of .

**Q5: **

Half the circumference of a certain circle is 549.5 cm. Determine its diameter, using 3.14 in place of .

**Q6: **

The perimeter of a square is twice the circumference of a certain circle. Given that the side of the square is 423.9 cm and using 3.14 to approximate , determine the diameter of the circle.

**Q7: **

The perimeter of a square is twice the circumference of a certain circle. Given that the side of the square is 675.1 cm and using 3.14 to approximate , determine the diameter of the circle.

**Q8: **

The perimeter of a square is twice the circumference of a certain circle. Given that the side of the square is 863.5 cm and using 3.14 to approximate , determine the diameter of the circle.

**Q9: **

If the circumference of a circle equals cm, find its radius.

**Q10: **

If the circumference of a circle equals cm, find its radius.

**Q11: **

If the circumference of a circle equals cm, find its radius.

**Q12: **

Using to approximate , what is the radius of a circle of circumference 264 cm?

**Q13: **

Using 3.14 to approximate , what is the radius of a circle of circumference 345.4 cm?

**Q14: **

A wheel covers a distance of 4β312 m after 98 cycles. Using in place of , find the wheelβs diameter.

**Q15: **

A wheel covers a distance of 3β972.1 m after 23 cycles. Using 3.14 in place of , find the wheelβs diameter.

**Q16: **

A wheel covers a distance of 3β265.6 m after 52 cycles. Using 3.14 in place of , find the wheelβs diameter.