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Question

To function properly, a rainwater outflow pipe must drop exactly 1 inch for every 25 inches of horizontal distance. A 40 feet long rainwater pipe runs under the edge of a roof. What is the vertical distance, in inches, the pipe must drop between its ends? Round your answer to the nearest tenth.

Answer 1

The first thing you need to do to answer this problem is convert the overall horizontal distance/length of the outflow pipe from feet to inches. Since the pipe is 40 feet long, we will take 40 and multiply it by the number of inches in a foot (12).

40ft x 12 = 480 inches

Now, it says that the pipe must drop 1 inch for every 25 inches of horizontal length/distance. So, we just figured out that the pipe has a distance or length of 480 inches, so let's divide that number by 25 to figure out how many "1 inches" the pipe needs to drop.

480 ÷ 25 = 19.4 inches

So, the pipe must drop a total of 19.4 inches in order to function properly.

Hope this helped!