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A quantity of alloy has a mass of 400 kg. It contains copper, lead and tin in the ratios, by mass, 15 : 3 : 2. The mass of lead in alloy is equal to

A) 40 kg
B) 60 kg
C) 200kg
D) 300 kg

Correct Answer:


B) 60 kg

Description for Correct answer:
Let masses of copper, lead and tin be 15x, 3x and 2x in alloy.

\( \Large \therefore 15x+3x+2x = 400 kg. \)

=> x = 20 kg.

Therefore, Mass of lead in alloy = \( \Large 3 \times 20 = 60 kg. \)

Part of solved Polynomials questions and answers : >> Elementary Mathematics >> Polynomials

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