A flower garden is shaped like a circle. Its diameter is 40yd. A ring-shaped path goes around the garden. The width of the path
is 6yd. 6yd40yd The gardener is going to cover the path with sand. If one bag of sand can cover 7yd2, how many bags of sand does the gardener need? Note that sand comes only by the bag, so the number of bags must be a whole number. If necessary, ref