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There are 120 seats in the cinema. Eighth grades come with the same number of students. If three grades come, there will be 54 free seats left. How many seats will be left if four grades come? Can you solve the problem in the form of a proportion or ratio?

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Answer to a math question There are 120 seats in the cinema. Eighth grades come with the same number of students. If three grades come, there will be 54 free seats left. How many seats will be left if four grades come? Can you solve the problem in the form of a proportion or ratio?

Expert avatar
Andrea
4.5
83 Answers
Ako u dvoranu dolaze tri razredna odjela i ostaje 54 slobodna mjesta, to znači da dolazi 3x učenika, gdje je x broj učenika u jednom razredu.

Broj zauzetih mjesta s tri razreda:
120 - 54 = 66

Dakle:
3x = 66 \Rightarrow x = \frac{66}{3} = 22

Broj učenika u jednom razredu je 22.

Ako dolaze četiri razreda to znači da dolazi 4 \times 22 = 88 učenika.

Broj slobodnih mjesta s četiri razreda:
120 - 88 = 32

Dakle, ostat će 32 slobodna mjesta.

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