Question

WHAT WILL BE THE COST OF 3.20KG OF AN ITEM ,IF 3KG OF IT COSTS RS.360!

Answer 1

$rate \: of \: 3kg \: of \: item \: = 360 rupees$

$rate \: of \: 1kg \: = \frac{360}{3} \\ rate \: of \: 3.20kg = \frac{360}{3} \times 3.20 \\ = 384rupees$