Regla de tres. Un obrero arma 45 mesas en 9 horas si al día siguiente tiene que armar 60 mesas, ¿Cuántas horas debe trabajar?

Para empapelar una habitación se utilizan 9 rollos de papel de 0,60 metros de ancho. ¿Cuántos rollos de 45 centímetros de ancho se necesitan para empapelar la misma habitación?

Un grupo de 18 trabajadores pueden hacer una obra en 20 días. ¿en cuántos días terminaran la misma obra, 24 trabajadores?

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?