Question

4.2kg of oranges are £8.76. How much does 2kg cost

Answer 1

2kg cost £4.18

Explanation:

4.2 kg of oranges cost £8.76

:. 1 kg of orange cost £8.76/4.2 = £2.09

2kg cost 2 × £2.09 = £4.18

Answer 2

x = 4.17

Explanation:

We can use a ratio to solve

4.2 k 2 k

---------------- = ---------------

8.76 x

Using cross products

4.2 * x = 2 * 8.76

4.2x =17.52

Divide by 4.2

x=4.17