There were 684 red and blue chairs altogether in a hall. The red chairs were arranged in 32 rows with 12 chairs in each row. The blue chairs were arranged in rows of 15. How many rows of blue chairs are there?

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There were 684 red and blue chairs altogether in a hall. The red chairs were arranged in 32 rows with 12 chairs in each row. The blue chairs were arranged in rows of 15. How many rows of blue chairs are there?

Jawaban:

20 rows

Penjelasan dengan langkah-langkah:

There were 684 red and blue chairs altogether in a hall.

12 × 32 = 384

684 – 384 = 300

300 ÷ 15 = 20

so, there is 20 rows of blue chairs.