Question
A 450 ml solution is composed of water and glucose mixed
in the ratio of 8:7. Determine the amount of glucose that must be added to the solution so that the new ratio of water to glucose becomes reversed, i.e., 7:8.Solution
Let the quantity of glucose which is to add to reverse the ratio be 'x' ml Quantity of water in the initial mixture = 450 X (8/15) = 240 ml Quantity of glucose in the initial mixture = 450 - 240 = 210 ml ATQ, {240/(210 + x) = (7/8) Or, 240 X 8 = 7 X (210 + x) Or, 1920 = 1470 + 7x Or, 1920 - 1470 = 7x Or, 7x = 450s So, 'x' = (450/7) = 64(2/7) ml Therefore, 64(2/7) ml of glucose to be added in the mixture.
A man purchases some number of apples at the rate of 36 apple for Rs. 1. How many for a rupee did he sell to gain 12.5%.
A bought a laptop for Rs.16000. He spent 22% of the amount that he had paid for buying it for its repair. He then sold the laptop to B and earned a prof...
A shopkeeper purchases two mobile phones for a total of Rs. 750. He sells the first mobile at a 20% profit and the second mobile at a 20% loss. If the ...
A trader sold two items for Rs. 150 each. He sold one at a profit of 20% and the other at a loss of 25%. What is the difference in their cost prices?
The cost price of article A and B is Rs. ‘X’ and Rs. (X + 550), respectively. Article A is sold at 20% profit while article B is sold at 10%...
Ajay purchased two items for a total of Rs. 750. He sold the first item at an 18% loss and the second item at an 18% profit. The selling prices of both ...
- A merchant offers a 20% discount to his customers on the marked price of a product. He still manages to make a profit of 60%. If the profit earned is Rs. 1...
A shopkeeper earns a profit of 30% by selling an article. What would be the approximate percent change in the profit percent, if he had paid 20% less an...
A pen was sold for Rs.166.44 with a profit of 14%. If it were sold for Rs.154.76, then what would have been the percentage of profit or loss?
The ratio between the sale price and the cost price of an article is 32 : 24. What is the ratio between the profit and the cost price of that article?
Relevant for Exams:
Hey, Don't leave. If you have any queries regarding any exam let us know here.
