Drain Pipe
Problem of the Week - July 31, 2023
A hollow piece of right cylindrical drainage pipe has an outside radius of 2.3 inches and an inside radius of 2.1 inches (outside radius is from the center of the pipe to the outside surface while the inside radius is from the center to the inside surface). The piece of drainage pipe is three feet long. To the hundredth of an inch, how many square inches are in the total surface area of the pipe? Use 3.14 as the approximation of Pi.
Immediately after your correct answer is submitted, your name will be posted here.
Past problems
Individual Monthly & Annual Rankings
Leaderboard Monthly & Annual Rankings
Request solution
Custom Leaderboards Are Here!
Take the competition to the next level and encourage participation by creating custom leaderboards for your students or friends to join. Click below to try it out now!