KS2 Primary Maths Age 13-17 - Calculations: Word Problems - Explained

The video tutorial explains how to calculate the cooking time for a chicken based on its weight. The rule is 20 minutes plus an additional 40 minutes for each kilogram. An example is provided for a 3kg chicken, resulting in a total cooking time of 140 minutes. The tutorial also covers a reverse calculation to find the chicken's mass if it takes 100 minutes to cook, concluding that the chicken weighs 2 kilograms.

What is the base cooking time for any chicken, regardless of its weight?

• 40 minutes

• 20 minutes

• 30 minutes

• 10 minutes

How much additional time is added per kilogram of chicken?

• 30 minutes

• 20 minutes

• 40 minutes

• 10 minutes

How long does it take to cook a 3-kilogram chicken?

• 100 minutes

• 120 minutes

• 160 minutes

• 140 minutes

If a chicken takes 100 minutes to cook, what is its mass?

• 4 kilograms

• 1 kilogram

• 2 kilograms

• 3 kilograms

What is the first step in determining the mass of a chicken that takes 100 minutes to cook?

• Subtract 20 minutes from the total time

• Add 20 minutes to the total time

• Multiply the total time by 40

• Divide the total time by 40