Lewis form factor for composite and full depth involute system is (where T = Number of teeth)

• A. <img src="/_files/images/mechanical-engineering/machine-design/601-533-1.png">
• B. <img src="/_files/images/mechanical-engineering/machine-design/601-533-2.png">
• C. <img src="/_files/images/mechanical-engineering/machine-design/601-533-3.png">
• D. none of these