Question
An alloy is made of 45% lead, 35% tin, and 20% copper.
How much lead should be added to 40 kg of the alloy so that the new alloy contains 55% lead?Solution
ATQ,
Quantity of the alloy = 40 kg
Quantity of lead in 40 kg alloy = (0.45 × 40) = 18 kg
Quantity of tin in 40 kg alloy = (0.35 × 40) = 14 kg
Quantity of copper in 40 kg alloy = (0.20 × 40) = 8 kg
Let the quantity of lead to be added be x kg.
According to the question,
Quantity of lead in the new alloy = (Quantity of tin + Quantity of copper)
(18 + x) = (14 + 8)
Or, x = 22 - 18 = 4
In which type of farming the fertility of soil is restored naturally ?
As per the First Advance Estimates of Kharif 2024–25 released by the Ministry of Agriculture and Farmers’ Welfare, which of the following states had...
Which company recently received SEBI's approval to start a mutual fund business?
_______of a substance is the temperature and pressure at which three phases (gas, liquid, and solid) of that substance may coexist in thermodynamic equi...
Find the equations of the bisectors of the angle between the straight line 3x + 4y +2 = 0 and 5x – 12y - 6 = 0.
- Which of the following scheme launched in 2017 to promote sports at grassroot level?
Recently which Indian- American has become the youngest ever chess grandmaster?
For which sport did Mariyappan Thangavelu won Rajiv Gandhi Khel Ratna Award 2020?
Prabha Atre is a renowned person in which field?
Which 12 Public Sector Banks recorded the highest profits for FY 2024?
