Question
An elephant can do a work as fast as two horses ‘A’
and ‘B’ can do it by working together. If horse ‘A’ alone can complete the work in 40 hours and horse ‘B’ in 60 hours, then find the time taken by elephant to complete the work.Solution
Let the total work = 120 units Efficiency of horse who can complete the work in 40 hours = 120/40 = 3 units/hour Efficiency of horse who can complete the work in 60 hours = 120/60 = 2 units/hour Therefore, time taken by both horses to complete the work together = 120/(3 + 2) = 24 hours Therefore, time taken by the elephant to complete the work = 24 hours
A shopkeeper bought 1200 units of a product at ₹25 per unit and sold them at ₹35 per unit. After selling 40% of the total units, he increased the se...
A seller marked the price of an item at Rs. 6,000. The seller gave successive discounts of (c + 6)% and (c - 6)% to a customer. If the customer paid Rs....
A shopkeeper sells an article for Rs 78 and earns twice the profit that he would have earned on selling this article for Rs 50. Find the C.P of t...
Cost price of an article is X. The article is marked up by Y% and sold while offering a discount of 25%. The profit earned is (Y + 20). When the same ar...
A loss of 10(1/2)% gets converted into a profit of 11(3/5)% when the selling price is increased by Rs132.60. The cost price (in Rs) of the article is:
A and B invest in a business in the ratio 4 : 5. After 10 months B leaves the business after withdrawing his investment. In the first year the business...
Determine the original price of an item purchased by A from a shopkeeper. A received a discount of 20%, while B bought the same item with a 37.5% discou...
A seller purchases an item for Rs. 240 and sells it with a 20% discount, earning a profit of 20%. If the seller increases the discount to 25%, what wou...
The item "Butter" is marked up by Rs. 490 above the cost price. Subsequently, a discount is applied, resulting in a 12% profit for the entire transactio...
A shopkeeper sells an article for Rs. 506, earning a profit of 15%. If the same article is sold for Rs. 396, what would be the profit or loss percentage?
