Bob can shuck 10 oysters in 5 minutes. How many oysters can he shuck in 2 hours? Let's think first. Chain of thought:
He shucks 10 oysters in 5 minutes we need to know how many 5 minute units are in 60 minutes so 60 / 5 = 12 units. He can shuck 10 oysters in 5 minutes and there are 12 5 minute units in an hour so he can shuck 10 * 12 = 120 oysters in 1 hour. If he can shuck 120 oysters in 1 hour, so for 2 hours in can shuck 2 * 120 = 240 oysters.
Therefore, the answer is 240.