The answer is 6 3/8 inches. A worm moves 3/8 inch every 5 minutes. The worm moves x for 1 hour 25 minutes. 1 hour 25 minutes = 1 hour + 25 minutes = 60 minutes + 25 minutes = 85 minutes. Now, make a proportion: 3/8 in : 5 min = x : 85 min. After crossing the products: x = 3/8 in * 85 min : 5 min = 3/8 in * 17 = 51/8 in = (48+3)/8 in = 48/8 in + 3/8 in = 6 3/8 inches.