Question

Find the cost of 14kg of flour if 4kg of them cost $28

$78
$88
$98​

Answer 1

$98

Explanation:

For this we will set the equations equal and cross multiply.

(4 / 28) = (14 / x)

4x = 392

x = 98

Answer 2

Unit rate:
$28 divided by 4kg = $7 per kg

$7 • 14kg = $98

It will cost $98 to buy 14kg of flour.