Question:
Goal: To make a makeshift phone speaker,

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Get a toilet paper roll and make a slit on the top. Place your smartphone, speaker side down, into the tube. You can use push pins in the toilet paper roll for support.

Question:
Goal: How can you break up concrete with tools in your garage?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Smash the concrete with a sledgehammer.

Question:
Goal: vinegar

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
can be poured through a hose