R Ravi Shankar 🎓 Newbie ⭐ 4.19K Points 📊 Surveying Q. The length of a long chord is equal to ? (A) R sin ? (B) R cos ? (C) 2 R sin ?/2 (D) 2 R cos ?/2 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) 2 R sin ?/2