〈【(πr^2)/2】×【arccos((0.985-0.485)/0.985)】×2/180-√(0.985^2-(0.985-0.485)^2×(0.985-0.485)〉×3.74×0.84=1.832吨
(πr2)/2:半圆面积;【arccos((0.985-0.485)/0.985)】×2:扇形中心角;√(0.985^2-(0.985-0.485)^2×(0.985-0.485):扇形中三角形面积;3.74圆柱长;0.84:柴油密度.
〈【(πr^2)/2】×【arccos((0.985-0.485)/0.985)】×2/180-√(0.985^2-(0.985-0.485)^2×(0.985-0.485)〉×3.74×0.84=1.832吨
(πr2)/2:半圆面积;【arccos((0.985-0.485)/0.985)】×2:扇形中心角;√(0.985^2-(0.985-0.485)^2×(0.985-0.485):扇形中三角形面积;3.74圆柱长;0.84:柴油密度.