In an alloy of 4 metals weighing 150 kg, 4/5 of the mass of the alloy is copper
| June 21, 2021 | education
In an alloy of 4 metals weighing 150 kg, 4/5 of the mass of the alloy is copper, and the rest of the metals have the same weight, among them there is lead, how much lead is in the alloy?
The required number of kilograms of lead in the alloy is determined by means of the conditional variable “X”.
Based on the conditions of the problem, we obtain the following equation: X x 3 = 150 x (1 – 4/5).
Based on the results of solving this equation, we get 3X = 150 x 1/5 or 3X = 150/5 or 3X = 30 or X = 30/3 = 10 kilograms of lead in the alloy.
Answer: the alloy contains 10 kilograms of lead.
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