注目の話題: 考え無しで発言する旦那に疲れた; 義母との関わり方; 私はどうでもいい女？

Science,English,and math 4th

No.217　21/04/04 09:23
燻し銀三 ( 60代 ♂ IJ7P0b ) あ+あ-

《A father of nuclear weapon and the estimation on Femir》

4『Calculating the amount of presumption on each element』

Amount of presumption, 4, the number of times on a single piano tuner who does its own job a year.

Thinking over the number of times on the piano for the single piano tuner tunes a year. How many of the piano are tuned?

Tuning the piano is a hard labor and takes a lots of time. Even if the piano tuner works harder, it can tune three pianos a day at most.

If the piano tuner is on a five-day week, and it works 250 days a year, 3×250＝750, so the number of the piano which the...

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