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PhysicsBowl 2018 Q17

  • Writer: keshprad
    keshprad
  • Mar 18, 2020
  • 1 min read

17) This question asks us to find the surface area — in square centimeters — of a pipe with the given measurements. We can start this problem with a diagram of the pipe.

ree
Where d is diameter, and ℓ is length

We can think of the surface as four parts. Each of the two ends of the pipe, the inside of the pipe, and the outside of the pipe.

ree
Where A is area, d is diameter, and ℓ is length

Answer: D

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