Lizzy: James wants to build a ladder to climb a very tall tree. Each rung of the ladder is 18 inches long and they are 6 inches apart. If he needs to climb 50 feet how many feet of wood will he need for the rungs?.
Me: Hmmm, let me think. I think this is the detailed solution:
He needs 12 / 6 = 2 rungs per foot. So he needs 50 * 2 = 100 rungs. Each rung is 18 / 12 = 1.5 feet. So he needs 1.5 * 100 = 150 feet. Final answer: 150.