a path separates two walls .A ladder leaning against one wall rests at apoint on the path .It reaches a height of 90m on the wall and maks and makes an angle of 60 degree with the ground . If while resting at the same point on the path , it is made to lean against the other wall , it would have made an agle of 45 degree with the ground. find the height it would have reached on the second wall.