College

A shop sells 3 different types of tea:

- 200 g of Kenyan tea costs £2.10
- 300 g of Colombian tea costs £3.45
- 150 g of Indian tea costs £1.70

a) Work out the cost of 100 g of each type of tea.

b) Which type of tea is the cheapest?

Answer :

Final answer:

Calculate the cost of 100g of each type of tea and determine the cheapest option.

Explanation:

a) To find the cost of 100g of each type of tea, we can use the unitary method. We divide the cost by the amount in grams and then multiply by 100 to find the cost of 100g.

For Kenyan tea:

Cost of 200g = £2.10

Cost of 1g = £2.10 / 200

Cost of 100g = (£2.10 / 200) * 100

For Columbian tea:

Cost of 300g = £3.45

Cost of 1g = £3.45 / 300

Cost of 100g = (£3.45 / 300) * 100

For Indian tea:

Cost of 150g = £1.70

Cost of 1g = £1.70 / 150

Cost of 100g = (£1.70 / 150) * 100

Let's calculate these values:

For Kenyan tea:

Cost of 100g = (£2.10 / 200) * 100 = £1.05

For Columbian tea:

Cost of 100g = (£3.45 / 300) * 100 ≈ £1.15

For Indian tea:

Cost of 100g = (£1.70 / 150) * 100 = £1.13

b) Comparing the costs, we can see that Kenyan tea is the cheapest at £1.05 for 100g.

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