MHT CET 2018 Physics Solved Paper

The ratio of magnetic fields due to a bar magnet at the two axial points P1 and P2 which are separated from each other by 10 cm is 25 : 2. Points P1 is situated at 10 cm from the centre of the magnet. Magnetic length of the bar magnet is (Points P1 and P2 are on the same side of magnet and distance of P2 from the centre is greater than distance of P1 from the centre of magnet)