Question

A solution of sugar is obtained by mixing 200 g of its 25% solution and 500 g of its 40% solution (both by mass). The mass percentage of the resulting sugar solution is____ . (Nearest integer)

Answer 1

Correct answer is 36

Total mass of sugar in mixture of 25% of 200 and 40% of 500 g

Sugar solution = 0.25 x 200 + 0.40 × 500

= 50 + 200 = 250 g

Total mass of solution = 200 + 500 = 700 g

Mass of sugar in solution = 250/700 x 100 = 35.7% ≈ 36%