A trader sold 40 bags of flour in 50-grams and 300-grams bags. Totally he sold 4.5 kg of flour. How many of each bag did the trader sell?

Question

Variables needed to solve.

Answer 1

Suppose f 50 gram bags

Then 40-f 300g bags

Total grams

50f + 300 (40-f) = 4500 (as 1 kg = 1000g)

50f + 12000 - 300f = 4500

7500 = 250f

f = 30

So 30 50-g and 10 300-g

Check

30 x 50 + 10 x 300 = 4500