Article Detail Which is longest river in world ? Answer: Nile, Africa Similar Questions : 1. Which is smallest planet ? Answer: Mercury 2. Which is the largest gulf ? Answer: Gulf of Mexico 3. Which is the Densest populated State of India ? Answer: West Bengal 4. Which is Largest Dome in World ? Answer: St. Peter's Basilica (Rome) 5. Which is largest Dome in India ? Answer: Gol Gumbaz (Karnataka) 6. Which is the highest dam in India ? Answer: Tehri Dam on Bhagirathi River in Uttarakhand (Height of 260 metres) 7. Which is the Densest populated State of India ? Answer: West Bengal Read more from - Longest and Largest