Question 14 of 17beginner🔧 ApplyNumerical2 marks

A school has 8 periods a day, each of 45 minutes duration. How long is each period, if the school has 9 periods a day, assuming that the number of school hours per day stays the same?

Correct Answer

Given: Initial periods = 8 Initial duration = 45 minutes New periods = 9 Total school time is constant.

Formula: Total time = Number of periods × Duration

Calculation: Total time = 8×458 \times 45 = 360 minutes New duration = 360 ÷ 9 = 40 minutes

Answer: Each period will be 40 minutes long.

Exercise: Figure it Out (Section 4) | Q: 9 | (Page Page 14)
For More Understanding

Explanation

The chapter explains inverse proportion. Total school time = Periods × Duration = constant. Initial: 8×458 \times 45 = 360 minutes. New duration: 360 ÷ 9 = 40 minutes per period.

Solution Steps

  1. Step 1: Calculate total school time: 8 periods × 45 minutes = 360 minutes

  2. Step 2: Calculate new duration per period: 360 minutes ÷ 9 periods = 40 minutes

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