In a cement concrete pavement. the width of expansion joint is 2.5 cm. The coefficient of thermal expansion of concrete is given as $$10 \times 10^{-6}$$ per °C. If the laying temperature is 15 °C and the maximum slab temperature during summer is 55 °C. then the spacing between expansion joints should be _____________

A

22.72 m

B

31.25 m

C

45.45 m

D

62.50 m