Article Detail Which is longest river in world ? Answer: Nile, Africa Similar Questions : 1. Which is Longest national highway of India ? Answer: NH-7 ( Varanasi to Kanyakumari - 2,369 km) 2. Which is the highest waterfall in the world ? Answer: Angel, Venezuela 3. Which Indian state is having longest coastline ? Answer: Gujrat 4. Which is the Highest mountain peak ? Answer: Mount Everest (8,850 m) 5. Which is the Largest lake of the world ? Answer: Caspian Sea (371,000 sq km) 6. Which is Highest Gallantry Award in India ? Answer: Paramveer Chakra 7. Which is smallest planet ? Answer: Mercury Read more from - Longest and Largest