2. For one cup of coffee Mr Zuma uses approximately 1 teaspoon of coffee, 2 teaspoons of sugar, 75 ml of milk and 150 ml of water. a) 1 teaspoon \( =5 \mathrm{ml} \). Write a ratio for the four ingredients. b) Use the ratio to calculate how much coffee, sugar, milk and water he needs to fill a 960 ml flask. (Show all of your calculationc.)

Step 1. Convert the given amounts to milliliters. • Coffee: 1 teaspoon = 5 ml • Sugar: 2 teaspoons = 2 × 5 ml = 10 ml • Milk: 75 ml (already in milliliters) • Water: 150 ml (already in milliliters) Thus, one cup of coffee contains: • 5 ml coffee • 10 ml sugar • 75 ml milk • 150 ml water a) Write the Ratio The amounts can be expressed as a ratio:  5 : 10 : 75 : 150 To simplify, divide each part by 5:  Coffee: 5 ÷ 5 = 1  Sugar: 10 ÷ 5 = 2  Milk: 75 ÷ 5 = 15  Water: 150 ÷ 5 = 30 So the simplified ratio is:  1 : 2 : 15 : 30 b) Calculate the Amounts Needed for a 960 ml Flask First, find the total volume of one cup of coffee:  Total volume = 5 ml + 10 ml + 75 ml + 150 ml = 240 ml Next, determine how many cups are needed to make 960 ml:  Number of cups = 960 ml ÷ 240 ml = 4 Now multiply the amounts for one cup by 4: • Coffee: 5 ml × 4 = 20 ml • Sugar: 10 ml × 4 = 40 ml • Milk: 75 ml × 4 = 300 ml • Water: 150 ml × 4 = 600 ml Verification:  20 ml + 40 ml + 300 ml + 600 ml = 960 ml Thus, to fill a 960 ml flask, Mr Zuma needs: • 20 ml of coffee • 40 ml of sugar • 300 ml of milk • 600 ml of water