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
A trader advertises that he sells sugar at cost price but uses a false weight where ‘N’ grams is shown as 1 kilogram. If he earns a profit of 25% pe...
Jeeva purchased an article for Rs.2500 and sold it at 25% above cost and paid a tax of Rs.125. Find the post-tax profit in rupees.
Article ‘P’, if sold at a profit of 18% earns a profit of Rs. 360. If article ‘P’ is marked 30% above its cost price and then sold after offerin...
A bag of cost price of Rs. 7000 is marked up by a certain percentage, and a discount percent of twice the markup percent is offered on it. If there is a...
Riya purchased a mobile phone for Rs. 18,500 and sold it for Rs. 21,275. What is the profit percentage she gained?
A shopkeeper marked an article 60% above its cost price and made a profit of Rs. 192 when he sold the article after giving a discount of 30%. Find the p...
- A laptop is given a discount of Rs. 2500, which is Rs. 1000 less than the profit made on the sale. If the cost price of the laptop is Rs. 2000, find out th...
A shopkeeper marked an article Rs. 200 above the cost price and sold it after giving two successive discounts of 12% and 18% respectively, and faces a l...
A shop seller offered a discount of Rs. 3500 on the marked price of a rice bag and earned a profit of 40%. If the difference between the cost price and ...
If a product is offered two successive discounts of 19% and 20%, what is the equivalent single discount?
