Question
‘A’ alone can complete a work in 50 hours. ‘A’
started the work alone and left after working on it for 40 hours. If ‘B’ completed the rest of the work in 10 hours then find the time taken by ‘A’ and ‘B’ together to complete the whole work.Solution
Let the total work = 200 units Then, efficiency of ‘A’ = (200/50) = 4 units/hour Work completed by ‘A’ alone in 40 hours = 4 × 40 = 160 units Remaining work = 200 – 160 = 40 units So, efficiency of ‘B’ = 40/10 = 4 units/hour Therefore, combined efficiency of ‘A’ and ‘B’ = 4 + 4 = 8 units/hour So, time taken by ‘A’ and ‘B’ together to complete the work = (200/8) = 25 hours
A retailer offered two consecutive discounts of 20% and 15% on an item marked at Rs. 775. Given that the ratio of the cost price to the selling price of...
A shopkeeper buys 25 notebooks at Rs. 32 each and sells all of them at Rs. 40 each. Find his profit percentage.
- A trader pretends to sell sugar at cost price but uses a weight of 'X' grams instead of 1,000 grams. If the profit percentage earned is (300/17)%, then wha...
- A dishonest shopkeeper sold rice at 20% profit on the cost price, but he uses a faulty weight that weighs 30% less than actual weight. Find the approx. act...
A trader marks his goods 40% above the cost price. He allows a discount of 20% on the marked price and still earns an additional profit of Rs 48 compare...
A shopkeeper bought article ‘A’ for Rs. ‘x’ and marked it 25% above its cost price and sold it for Rs. 2600. Marked price of article ‘B’ is ...
Matthew sells Chocolates in the packs of 6 chocolates, 12 chocolates, 18 chocolates and 24 chocolates etc, but the rate is necessarily uniform. One day...
The marked price of an article is Rs. 15,500, and it is sold at a 22% discount. The profit made on selling the article is Rs. 1,250. What is the cost pr...
A shopkeeper sells two articles at Rs 840 each. On one he gains 20% and on the other he loses 20%. Find his total profit or loss.
A shopkeeper marked an article ‘A’ 25% above the cost price and sold it for Rs. 7056 after giving a certain discount while he sold an articl...
