Arif travels from A to B at a speed of 6 km/h. On his way back, he travels at a speed of 4 km/h, thus making the return trip 4 hours longer. What is the distance (in km) between A and B?

প্রশ্নঃ Arif travels from A to B at a speed of 6 km/h. On his way back, he travels at a speed of 4 km/h, thus making the return trip 4 hours longer. What is the distance (in km) between A and B?