Alex04 The diameter of the pond is 6 foot and the depths is 2 and a half foot , how many litres is?

if the shape of the pond is cilindrical:
A = pi x R^2 = 3.14 x (6/2)^2 = 28.26 sq feet
V = A x H = 28.26 x 2.5 = 70.65 cubic feet
1 cubic feet = 28.32 liters => 70.56 x 28.32 = 2000.80 liters