Answer:
754.39 in²
Explanation:
recall that area of a circle is given by
Area = πr² where r is the radius of the circle
in this case, diameter = 31 inches
hence radius, r = 31/2 = 15.5 inches
Area = πr²
= 3.14 (15.5)²
= 754.385 in²
= 754.39 in² (2 dec pl)