what is the area of a 78 ft diameter circle

Question

i need to know the area of a circle if the diameter is 78 ft

Answer 1

Given d = 78ft

We know that r = d/2

r = 78/2

r = 39ft

Area of circle = pi*r^2

= 22/7*39*39

= 33462/7

= 4780.28 square ft.