+188 Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter.
+128663 We need to find the perimeter of two half circles, one with a radius of 15/ 2 = 7.5 m, and the other with a radius of [7.5 - 1.25] = 6.25 m
This is given by :
pi [ 7.5 + 6.25] = about 43.2 meters
The rest is easy......the total length of the 11 segments = 11*1.25 = 13.75m
So....the total length of the wrought iron = 43.2 + 13.75 = about 56.95 m
