Wooden Rack According to the World Pool Association, the diameter of a pool ball is 2.25...

Wooden Rack According to the World Pool Association, the diameter of a pool ball is 2.25 in. Fifteen balls fit snugly into a wooden rack, as shown in the accompanying figure. The rack is an equilateral triangle whose sides are 0.25 in. thick. Find the out-side perimeter of the rack to the nearest tenth of an inch.