Of what river is XXX a tributary?
Yamuna
Ken River, flows through Bundelkhand region of Madhya Pradesh and Uttar Pradesh, it originates near village Ahirgawan in Jabalpur district and travels a distance of 427 kilometres (265 mi), before merging with the Yamuna at Chilla village, near Fatehpur in Uttar Pradesh, and has an overall drainage basin of 28,058 square kilometres (10,833 sq mi).