Two circles are placed in a rectangle. Each circle has a circumference of 62.8 cm. The edges of the circles touch the rectangle. Two circles are placed side by side inside a rectangle. The circles touch the edges of the rectangle and each other. The longest side of the rectangle is labeled x. What is the approximate length, in centimeters, of side x? (Use 3.14 for π.)
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm