A window consists of a circular metal frame 2 cm wide, if the window has an inner radius of 30 cm what is the total area of the circular metal frame

Question

please help

Answer 1

Area of inner part of window:

πr² = 30²π = 900π cm²

 

Area of total including frame:

πr² = 32²π = 1024π cm²

 

Area of frame = Total area - window area = 124π cm²