Question
The speed of a boat in still water is 20 km/hr. If the
boat covers 80 km in upstream in 8 hours, then find the time taken by the boat to travel 150 km in downstream.Solution
Let the speed of the boat in still water and the speed of the current be ‘x’ km/hr and ‘y’ km/hr, respectively Upstream speed of the boat = (x – y) = 80/8 = 10 km/hr Or, 20 – y = 10 Or, y = 20 – 10 = 10 km/hr Therefore, downstream speed of the boat = 20 + 10 = 30 km/hr Required time taken = 150/30 = 5 hours
A farmer sells two cows at ₹5000 each. On one, he gains 25%, and on the other, he loses 20%. Find his overall profit or loss.
A shopkeeper planned to sell 200 shirts each priced at Rs 2,240 in a particular year. Each shirt, if it had been sold at the mentioned price would have...
A trader marks up his goods by 40% and offers a discount of 10%. If the cost price of the goods is ₹300, find his actual profit percentage.
A purchased an article for Rs 1300. She sold the article at 12% profit. She then added Rs 400 to the amount received and purchased a purse such that the...
After allowing a 10% discount on the marked price of an article, a dealer makes a profit of 5%. What is the marked price, if the cost price of the artic...
- If the average cost price of 18 identical bags decreases by Rs. 5 after replacing one bag with a new bag that costs Rs. 90, what was the original cost pric...
A person named 'X' purchased a mobile phone and a headphone. He sells the mobile phone at a 20% profit and the headphone at a 10%...
40 Chairs are bought at the marked price of 36 chairs. If these 40 chairs are sold after giving a discount of 1%, find the profit percentage.
A shopkeeper sold an article after giving a discount of 25% and made a profit of Rs.75. Find the difference between the marked price and selling price o...
Marked price of an article is Rs.1000 more than the cost price. When the same article is sold at a discount of Rs.100, the profit percent earned is 15%....
