Article Detail Which is the longest road in India ? Answer: Grand Trunk Road (2500 Km) Similar Questions : 1. Which is longest river of South India ? Answer: Godavari 2. Longest rail tunnel in the world ? Answer: Seikan Tunnel (Japan - 53.9 Km) 3. Which is the Highest mountain peak ? Answer: Mount Everest (8,850 m) 4. Which is the longest Platform ? Answer: Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters) 5. Which is biggest planet ? Answer: Jupiter 6. Which is the largest Mosque in India ? Answer: Jama Masjid (Delhi) 7. Which is the largest Zoo in India ? Answer: Zoological Gardens, Alipur, Kolkata Read more from - Longest and Largest