A plumber has an 8-foot piece of copper pipe. He needs to cut a 3-foot, 10-inch piece of copper pipe to repair a leak in a sink's water line. How many inches of copper pipe will he have left after he makes the repair?
Question
A plumber has an 8-foot piece of copper pipe. He needs to cut a 3-foot, 10-inch piece of copper pipe to repair a leak in a sink's water line. How many inches of copper pipe will he have left after he makes the repair?
Solution
Step 1: Convert all measurements to the same unit. In this case, we'll use inches. There are 12 inches in a foot, so an 8-foot pipe is 8 * 12 = 96 inches.
Step 2: The plumber needs a piece that is 3 feet 10 inches long. Convert this to inches as well. 3 feet is 3 * 12 = 36 inches. So, the piece he needs is 36 + 10 = 46 inches.
Step 3: Subtract the length of the piece he needs from the total length of the pipe to find out how much will be left. 96 - 46 = 50 inches.
So, the plumber will have 50 inches of copper pipe left after he makes the repair.
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