Three valves, when opened individually, can drain the water from a certain tank in 3, 4 and 5 minutes respectively. What is the greatest part of the tank that can be drained in one minute by opening just two of valves?
A. 7/12
B. 4
C. 5
D. 7
সঠিক উত্তরঃ
A.
7/12
Explanation:
Related Questions (Any University/Year)
- Two boats on the opposite shores of a river start moving towards each other. When they pass each other they are 750 yards from one shoreline. They each continue to the opposite shore, immediately turn around and start back. When they meet again they are 250 yards from the other shoreline. Each boat maintains a constant speed throughout. How wide is the river?
- There are 50 students enrolled in Business Studies. Of the enrolled students 90% took the final exam. Two-thirds of the students who took the final exam passed the final exam. How many students passed the final exam?
- ০.০০১ x ১০০০ = =?
- 80 apples were stored in two baskets in such a way that 6 times the content of the larger basket is 16 more than 10 times the content of the smaller basket. How many apples were stored in the smaller basket?
- The average weekly salary per head of all employees is Tk. 1000 (Supervisors and Labours). The average weekly per head salary of all supervisors is Tk. 6000 while the average weekly salary per head of all labours is Tk. 750. If there are 840 labours in it find the number of supervisors
- 6 pints of a 20 percent solution of alcohol in water are mixed with 4 pints of a 10 percent alcohol in water solution. The percentage alcohol in the new solution is
- The average age of a man and his son is 20. after 10 years, their age will be in the ratio 2:1. What was the age of the man and his son 5 years ago respectively?
- Rectangle ABCD has a perimeter of 26. The half circle with diameter AD has an area of 8π. What is the perimeter of the part of the figure that is not shaded?
- The total age of A and B is 12 years more than the total age of B and C .C is how many years younger than A?
- If each photocopy of a manuscript costé 4 cents per page, what is the cost, in cents, to reproduce x copies of an x-page manuscript?
- The daily rate of a hotel room that accommodates 4 people is Taka 3900 for one person and Taka x for each additional person. If 3 people take the room for one day and each pays Taka 2100 for the room, what is the value of x?
- 9 numbers are written in ascending order, middle number is average of that nine numbers. Average of five larger numbers is 68 and also average of five smaller numbers is 44. What is the sum of all nine numbers?
- Rabib has x more marbles than Rafi has. Together they have y marbles.Which of the following represents the number of marbles that Rafi has?
- If coconuts are twice as expensive as bananas and bananas are one-third as expensive as grapefruits, what is the ratio of the price of one coconut to one grapefruit?
- The average weight of 3 men is 53 kg. None of them weighs less than 51 kg. What is tha maximum possible weight (in kg of a person in that group?
- In Rajshahi 5 adults are unemployed for every 120 adults who have jobs. Out of 2125 adults, how many have jobs?
- একটি ঝুড়িতে আপেল এবং কমলা মিলিয়ে ২১ টি ফল আছে।প্রতিটি আপেল ১৫ টাকা এবং কমলা ১৮ টাকা দামে কেনা হয়েছে।সবগুলো ফল কিনতে যদি ৩৪৮ টাকা খরফ হয় তবে আপেল এবং কমলার মোট দামের পার্থক্য কত?
- Diana bought a stereo for $530, which was the retail price plus a 6 percent sales tax. How much money could she have saved if she had bought the stereo at the same retail price in a neighboring state where she would have paid a sales tax of 5 percent?
- The price of article has been reduced 25%.In order to restore the original price the new price must be increased by
- The batting average for 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest score by 172 runs. If these two innings are excluded then the average of the remaining 38 innings becomes 48 nuns. what is his highest score?