Q. The longest tributary of Krishna River is:
Answer: Bhima River
Notes: The largest tributary of the Krishna River is the Tungabhadra River with a drainage basin measuring 71,417 km2, running for about 531 km, but the longest tributary is the Bhima River, which makes a total run of 861 km and has an equally large drainage area of 70,614 km2.

This question is part of Karnataka General Studies MCQ Series Course on GKToday Android app.