Question
A boy can swim a certain distance downstream in 2 hours
and return in 5 hours. If the rate of stream is 3 kmph then what is the speed of boy in still water?Solution
Let the speed of the boy in still water be x kmph. Then, (x + 3) × 2 = (x – 3) × 5 => 2x + 6 = 5x - 15 => 3x = 21 => x = 7 kmph
The cost price of two dozen bananas is Rs. 96. After selling 18 bananas at the rate of Rs. 36 per dozen, the shopkeeper reduced the rate to Rs. 24 per d...
A shopkeeper purchased 80 identical articles for a total of ₹20,000. He sold 60% of these items at a 25% profit and the remaining at a 15% loss. Calcu...
A retailer increased the price of a gadget by 35% relative to its cost price. If the gadget is sold at a 25% discount, determine the retailer's gain per...
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?
The initial item has a markup and discount percentage both set at 15%, with a selling price of Rs. 1955. If a discount of 10% is applied to the same ite...
A dishonest shopkeeper pretends to sell his goods at cost price but uses false weights and gains 25%. For a weight of 1 kg he uses:
A person bought some mangoes at the rate of 7 per rupee. He bought the same number of mangoes at the rate of 6 per rupee. He mixes both types and sells ...
- If the average cost price of 25 identical shirts decreases by Rs. 5 after replacing one shirt with a new shirt that costs Rs. 100, what was the original co...
A shopkeeper sells an article for Rs 350 and earns twice the profit that he would have earned on selling this article for Rs 300. Find the C.P of this a...
A shopkeeper marked an article 40% above its cost price and made a profit of Rs. 80 when he sold the article after giving a discount of 25%. Find the pr...
Relevant for Exams:
