Two trains of lengths 280 m and 220 m are running towards each other on parallel lines, one at the speed of 70 km/hr and another at 50 km/hr, respectively. How much time (in seconds) will they take to cross each other?

Two trains of lengths 280 m and 220 m are running towards each other on parallel lines, one at the speed of 70 km/hr and another at 50 km/hr, respectively. How much time (in seconds) will they take to cross each other?
280 मीटर और 220 m लंबीई वाली दो ट्रेनें समानांतर पटरियों पर क्रमश: 70 km/hr और 50 km/hr की चाल से एक दूसरे की ओर गतिमान हैं। उन्हें एक-दूसरे को पार करने में कितना समय (सेकंड में) लगेगा?