Question:

A round pie with radius 14 cm weighs 2.5 kg. A wedge-shaped piece with central angle 72 degree is cut out. Find the weight of the remaining pie.

I have two solutions:

(1) (Area of remaining pie)/(Total area) x 2.5 kg = 1.5 kg

(2) ((360-72) degrees)/(360 degrees) x 2.5 kg = 2.0 kg

Which one is the correct answer??

WHY??

Thanks for those who helped