• 781 A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank? ›
• 782 A milkman pays Tk. 6.40 per liter of milk. He adds water and sells the mixture at Tk. 8 per liter. By doing this, he makes 37.5% profit. Find the proportion of water to milk received by the customers? ›
• 783 A person buys a TV worth BDT 3,90,000 with a down payment of 40,000 including Tk. 5,000 as first month’s installment. How many more installments does he have to pay if his installments had to double after each successive payment? ›
• 784 A pump can fill a tank with water in 2 hours. Because of a leak, it too fill the tank. The leak can drain all the water of the tank in: ›
• 785 A student is to answer 10 out of 13 questions in an examination such that the must choose at least 4 from the first five questions. The number of choices available to him is ›
• 786 A team of 2 men and 5 women completed one-fourth of a project in 3 days. After 3 days, one woman left and one man joined the team. The newly formed team took 2 days to complete another one-fourth of the project. How many days will it take to complete the project alone? ›
• 787 A milkman purchases the milk at Tk. x per liter and sells it a Tk. 2x per liter still he mixes 2 liters water with every 6 liters of pure milk. What is the profit percentage? ›
• 788 A person buys some pen and pencil. The pen costs TK. 7 each and pencils cost TK. 3 each. If he spends exactly TK. 81 and buys maximum number of pen possible under these conditions, what is the ratio to pencil ? ›
• 789 A rectangular fish tank 25m by 9m has water in it to a level of 2m. This water is carefully poured into a cylindrical container with a diameter of 10m. How high will the water reach in the cylindrical container? ›
• 790 A student loses 1 mark for every wrong answer and scores 2 marks for every correct answer. If he answer all the 60 questions in an exam and scores 36, marks, how many of them were correct? ›
• 791 A TK. 30,000 prize is to be divided among three employees in the ratio of 2:3:5 . What is the value of the smallest share ? ›
• 792 A mixture of 20 kg of sprit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25% ›
• 793 A person crosses a 600 meters long street in 5 minutes. What is his speed in kilometers per hour? ›
• 794 A rectangular floor that measures 8 meters by 10 meters is to be covered with carpet squares that each measure 2 meters by 2 meters. If a carpet square costs Tk. 12.00, calculate the total cost to cover ⅔ of the floor? ›
• 795 A student multiplied a number by 5/3 instead of ⅗. What is the percentage of error in the calculation? ›
• 796 A total of x feet of fencing is to form three sides of a rectangular yard. What is the maximum possible area of the yard in terms of x? ›
• 797 A monkey climbs a 60m high pole. In first minute he climbs 6m and slips down 3m in the next minute. How much time is required by it to reach the top? ›
• 798 A person has TK. 950 in 29 notes consisting of TK. 500,100, 50 and 10. How many notes should at least be in TK. 50 ? ›
• 799 A salesman receives daily wage of Tk. 250 and earns a commission of 15% on all sales he makes. How much taka worth of sales does he need to make in order to bring his total daily income of Tk. 1000? ›
• 800 A student scored 80 marks in his first test. After taking the third test, his average dropped from 82 to78 . What is the average of his 2nd and 3rd tests ? ›
• 801 A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth, The percentage of decrease in area is: ›
• 802 A man is running at a speed of 3 km/hr in the direction of the train whose length is 500 meters. If the train is moving at a speed of 63 km/hr then how many seconds will this train take to cross the man? ›
• 803 A motor-cycle covers 40km with a speed of 20 km/hr. Find the speed of the motor-cycle for the next 40km journey so that the average speed of the whole journey will be 30 km/hr. ›
• 804 A person needs to pay Tk. 500 to buy 100 pencils and Tk. r for any additional unit of pencil. If the customer pays a total of Tk. 4,700 for 1,200 pencils, what is the value of x? ›
• 805 A school has a total of 90 students. There are 30 students taking Physics, 25 taking English, and 13 taking both. Approximately what percentage of the students is taking either Physics of English? ›
• 806 A sum fetches a simple interest of Tk. 6,000 at the rate of 5% p.a. in 6 years. What would be the compound interest earned at the same rate of interest and the same principal in 2 years? ›
• 807 A trader paid Tk. 300 for a shipment of x identical pens. The trader gave two pens free of cost and sold each for Tk. 5 more than the average cost of the x pens. If the total revenue from the sale of the pens was Tk. 120 more than the cost of the shipment, how many pens were in the shipment? ›
• 808 A man row a certain distance along the stream and against the stream in 1 hour and 1.5 hours respectively. If the velocity of the current is 3 km/hr, what is the speed of a man in still water? ›
• 809 A motor-cycle covers 40km with a speed of 20 km/hr. Find the speed of the motor-cycle for the next 40km journey so that the average speed of the whole journey will be 30km/hr. ›
• 810 A person rides a bicycle round a circular path of radius 50m. The radius of the wheel of the bicycle in 50cm. The cycle comes to the starting point for the first time in 1 hour. What is the number of revolutions of the wheel in 15 minutes? ›