Question
A can do a work in 30 hours while B can do it in 20
hours. If C is 60% more efficient than A and B together, then find the time taken by C alone to complete the work.Solution
ATQ, Total work = LCM of (30 and 20) = 60 units
Work by A in one hour = 60 ÷ 30 = 2 units
Work by B in one hour = 60 ÷ 20 = 3 units
Work by A and B together = 2 + 3 = 5 units
C is 60% more efficient → C’s work = 5 + (60% of 5) = 5 + 3 = 8 units
Time taken by C = 60 ÷ 8 = 7.5 hours
- The amount by which the marked price is higher than the selling price is 33% of the difference between the marked price and the cost price. If the item is ...
A shopkeeper sold an article after giving a discount of 20% and made a profit of Rs. 75. Find the marked price of the article if cost price of the artic...
Cost price of an article is Rs. (6p + 240). It is marked 50% above its cost price and sold after allowing a discount of 'k%'. If the profit earned is (k...
Amit purchased a smartphone at the price of Rs. 25,000 and sold it at a loss of 15%. With this money, he again purchased a new smartphone and sold that ...
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...
Cost price of a bag is Rs.750. The shopkeeper marked it 80% above the cost price and sold it after giving a discount of 20%. If the shopkeeper had sold ...
An article is priced 30% higher than its cost price, which is Rs. 2,400. After offering two successive discounts, one of 10% and another of Rs. 228, the...
The cost price of five dozen sandwiches is Rs. 300. After selling 42 sandwiches at the rate of Rs. 90 per dozen, the shopkeeper reduced the rate and sol...
- A shopkeeper marked a product 35% above its cost price. If the marked price is Rs. 10,800 and a discount of 25% is given, calculate the profit earned (in R...
A merchant sells two items, 'X' and 'Y'. The cost price ratio of item 'X' to item 'Y' is '3:5'. The profit earned on selling item 'X' is 35%, while on i...
