GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Direct Proportion Problems - Explained

The video tutorial explains how to calculate the cost of 2 kilograms of meat when given the cost of 3 kilograms. It starts by determining the cost of 1 kilogram through division, then calculates the total cost for 2 kilograms using multiplication or addition. The tutorial also discusses the allocation of marks for solving the problem, emphasizing the importance of finding the cost per kilogram.

If 3 kilograms of meat cost 54 pounds, how much does 1 kilogram cost?

• 18 pounds

• 16 pounds

• 22 pounds

• 20 pounds

What is the first step in calculating the cost of 2 kilograms of meat?

• Multiply the cost of 3 kilograms by 2

• Divide the cost of 3 kilograms by 3

• Add the cost of 1 kilogram twice

• Subtract the cost of 1 kilogram from 54

How much does Nina pay for 2 kilograms of meat?

• 36 pounds

• 38 pounds

• 32 pounds

• 34 pounds

What mathematical operation can be used to find the cost of 2 kilograms once the cost of 1 kilogram is known?

• Addition

• Division

• Multiplication

• Subtraction

How many marks are allocated for finding the cost of 1 kilogram?

• Three marks

• Two marks

• One mark

• Four marks