Article Detail Which is longest river in world ? Answer: Nile, Africa Similar Questions : 1. Which is Highest Battle field ? Answer: Siachin Glacier. Mastguru team Salutes to Indian soldiers. 2. Which is the Densest populated State of India ? Answer: West Bengal 3. Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) 4. Which is longest river in world ? Answer: Nile, Africa 5. Which is the largest Zoo in the World ? Answer: Berlin Zoological Garden (Germany) 6. Which is the highest dam in India ? Answer: Tehri Dam on Bhagirathi River in Uttarakhand (Height of 260 metres) 7. Which is the Highest mountain peak ? Answer: Mount Everest (8,850 m) Read more from - Longest and Largest