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Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 7 × x = 7x km/hr Downstream speed of boat = 7x + x = 8x km/hr According to question; 8x = 144/9 = 16 Or, x = 2 Upstream speed of the boat = 7x – x = 6x = 6 × 2 = 12 km/hr Required time taken = 120/12 = 10 hours
A shopkeeper marked an article P% above its cost price and sold it for Rs. 2160 after giving a discount of 20%. If the ratio of cost price and selling p...
A Publisher published 2500 books for Rs. 175000. He gave 400 books free as samples to some books shops, besides he was able to sell 2/3 rd of the remain...
A man buys cashew nuts at Rs.600 per kg and sells them at Rs.15 per 50 grams. What is his profit/loss percentage?
Article A is sold at a loss of 33.33% of its selling price, and Article B is sold at a profit of 40% of its cost price. Both articles are sold for the s...
A man purchases an equal number of oranges at two different rates: 3 for Rs 13 and 5 for Rs 20. He then sells all the oranges at a rate of 4 for Rs 15. ...
A man bought an article at a certain price, marked it 32% above the cost price and sold it after giving a discount of 25%. If he had bought it for 20% l...
A Washing Machine was sold with two successive discounts of 12% and 20%. If it had been sold with a single discount of 32%, there would have been a lo...
