2707. There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of_______________? September 7, 2025 by Admin A. 1 : 1½ : 2 B. 2 : 1½ : 1 C. 1 : 1 : 2 D. None of these ✅ The correct answer is option C.