Question

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

Answer 1

its 33, here's my proof 25-40 I count the missing numbers it's 15 I count each side seven times the last number is 33.

Answer 2

it must drop 1.6 inches on each end i believe.