The cost of 16 bags of cement, each weight 1.5kg,is $672. Find the cost of 18 bags of the same,each weight 2kg?
16 baqgs * 1.5 kg = 24 kg
$672 / 24 kg = $28 / kg
18 bags * 2 kg = 36 kg
36 kg * $28 / kg = $ 1,008
OR
16 * 1.5 / ( 18 * 2 ) = 672 / x
24 / 36 = 672 / x
2 * 12 / ( 3 * 12 ) = 672 / x
2 / 3 = 672 / x
2 * x = 3 * 672
2 x = 2,016
x = 2,016 / 2
x = $ 1,008