Answer:
7560
Step-by-step explanation:
view picture
Check the image below
Maybe 15cm?
125.6
all you have to do is multiple the 3.14 with 40 cm to get 125.6 cm
314.16 sq mm
formula for area of a circle = pi(r^2)
if the diameter is 20mm then the radius is 10 mm
When you plug in pi(10mm^2) you get 314.16 sq mm
