Question

Ruby wants to prepare lemonade for her birthday party. She needs to make 25 glasses of lemonade. For making a glass of lemonade, 110 g of sugar and 200 mL of water are needed. Estimate the amount of sugar and water needed to prepare 25 glasses of lemonade (round off to the nearest 1000).

• A. 3 kg of sugar, 5 L of water
• B. 4 kg of sugar, 5 L of water
• C. 2 kg of sugar, 4 L of water
• D. 5 kg of sugar, 5 L of water

Answer 1

The correct option is A 3 kg of sugar, 5 L of water

To prepare a glass of lemonade, 110 g of sugar is needed.

To prepare 25 glasses, 25 $\times$ 110 = 2750 g sugar is needed.

Rounded off to the nearest thousands, 2750 $\to$ 3000

1000 g = 1 kg
3000 g = 3 kg

To prepare a glass of lemonade, 200 mL water is needed.

To prepare 25 glasses, 25 $\times$ 200 = 5000

1000 mL = 1 L

Hence, 3 kg of sugar with 5 L of water are needed.