V Vinay Kumar 🎓 Tutor III ⭐ 8.55K Points 📊 Machine Design Q. Gear box is used (A) to produce torque (B) for speed reduction (C) to obtain variable speeds (D) to increase efficiency of system 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) to obtain variable speeds