Question 13 of 17beginner🔧 ApplyNumerical2 marks

A given set of chairs are arranged in 25 rows, with 12 chairs in each row. If the chairs are rearranged with 20 chairs in each row, how many rows does this new arrangement have?

Correct Answer

Given: Initial arrangement: 25 rows with 12 chairs per row. New arrangement: 20 chairs per row.

Formula: Total chairs = Rows × Chairs per row

Calculation: Total chairs = 25×1225 \times 12 = 300 New rows = 300 ÷ 20 = 15

Answer: The new arrangement will have 15 rows.

Exercise: Figure it Out (Section 4) | Q: 8 | (Page Page 14)
For More Understanding

Explanation

The chapter explains inverse proportion. Total chairs = Rows × Chairs per row = constant. Initial: 25×1225 \times 12 = 300 chairs. New arrangement: 300 ÷ 20 = 15 rows.

Solution Steps

  1. Step 1: Calculate total number of chairs: 25 rows × 12 chairs = 300 chairs

  2. Step 2: Calculate new number of rows: 300 chairs ÷ 20 chairs per row = 15 rows

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