A container holds 40 gallons which is 80% water and 20% acid. How much of the water must be evaporated to produce a solution containing 50% acid?
A. 22 gallons
B. 24 gallons
C. 26 gallons
D. 28 gallons
E. 32 gallons
সঠিক উত্তরঃ
B.
24 gallons
Explanation:
Related Questions (Any University/Year)
- If one number exceeds another number by 13 and the large number is 3/2 times the smaller, then the smaller number is-
- How many times does the digits '4' come to write numbers from 10 to 100?
- The reciprocal of pln is nlp and vice versa. Which of the following is the reciprocal of 2/√18
- A long rope has to be cut to make 23 small pieces. If it is double folded to start with, how many times does it need to be cut?
- A sum of BDT 200 will be divided among 5 swimmers, named Emran, Durjoy, Chopol, Billal and Anabi, who have just finished a swimming competition. Everyone will receive at least BDT 5 and no two swimmers will receive the same amount of money. Emran has come \(1^{st}\) and will get BDT 80; Durjoy has come \(2^{nd}\), Chopol is \(3^{rd}\), Billal is \(4^{th}\) and Anabi is last. Moreover, the distribution of money is subject to the following conditions: • No one will get any fractional amount of money. • The swimmer who finishes earlier must receive more money than the swimmer(s) he defeats. What are the greatest and least amount of money, consecutively, that Durjoy can receive?
- A dishonest milkman professes to sell his milk at cost price but he mixes it with water and there by gains 25% . The percentage of water in the mixture is:
- ঢাকা থেকে চট্টগ্রাম এর দূরত্ব ১৮৫ মাইল। চট্টগ্রাম থেকে একটি বাস ২ ঘণ্টায় প্রথম ৮৫ মাইল যাওয়ার পর পরবর্তী ১০০ মাইল কত সময়ে গেলে গড় ঘন্টায় ৫০ মাইল যাওয়া হবে?
- A straight fence is to be constructed from posts 6 inches wide and separated by lengths of chain 5 feet long. If a certain fence begins and ends with a post, which of the following could not be the length of the fence in feet? (12 inches =1 foot)
- A PhD research group has 12 male and 18 female participants. Males are what fraction of the class?
- What percentage of profit is made by selling an article at a certain price if by selling at two third of that price these would be a loss of 20%?
- চারটি মেশিন একই গতিতে একসাথে কাজ করে ৬ দিনে - x টি কলম উৎপাদন করতে পারে। ঐ একই গতিতে ৪ দিনে ৩x টি কলম উৎপাদন করতে কতটি মেশিনের কাজ করতে হবে?
- What is 0.04 x 0.032 in terms of percent?
- The difference between two positive numbers is 16. If the smaller of those two numbers is 3/5th of the larger, what is the value of the smaller number?
- If 6 workers can complete 9 identical job in 3 days, how long will it take 4 workers to complete 10 such jobs ?
- রাবেয়া একটি বালিকা শ্রেনির যে কোনো প্রান্ত থেকে একাদশ অবস্থানে আছে। শ্রেনিতে মোট বালিকার সংখ্যা কত?
- A picnic was arranged by m students. Total cost of the picnic was estimated to be y taka. Unfortunately, z students withdrew their names from the picnic. How many more taka would each of the remaining students have to pay?
- x+y=12 এবং x-y=2 হলে xy এর মান কত ?
- 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?
- In his pocket , a boy has 3 red marbles , 4 blue marbles , and 4 green marbles , How many marbles will he have to take out of his pocket to ensure that he has taken out at least one of each colour?
- Y is four times as old as X. After 6 years, the sum of half of X's age and a fourth of Y's age will be the same as three times the present age of X. How old will X be after 6 years?
- Rima bought 4 books that cost Tk 6 each and 2 books that cost tk 3 each .what's the averge cost of the six books?
- 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
- If Robert can sell 40 envelopes in 1 minute and Paul can do the same job in 80 seconds how many minutes ( to the nearest minute) it will take the two of them working together, to seal 350 envelopes?
- 40% of students in a class are smart. The rest are stupid. Half the students play sports and half don't. If 20% of the students are smart and play sports, what percent of the students are stupid and don't play sports?
- Six men can earn as much as eight women, two women can earn as much as three boys and four boys can earn as much as five girls. If a girl can earn Tk. 50 a day, what amount can a man earn in a day?
- The missing number in the bracket 21 (9) 12, 24 (?) 9 is
- The average age of a team is 32.7 years. The average age of the males in the team is 33.2 years and the average age of the females is 32.2 years. What is the ratio of the number of females to the number of males in the team?
- The average age of boys in the class is twice the number of girls in the class. If the ratio of boys and girls in the class of 36 be 5:1, what is the total of the ages of the boys?
- The HCF of two numbers is 23 and the other two factors of their LCM are 13 and 14. The larger of the two number is
- কাফি ও খলিল একটি কাজ যথাক্রমে ১০ দিনে ও ১৫ দিনে করতে পা??ে। তারা একত্রে কাজটি কত দিনে করতে পারবে?
- The present ratio of students to teachers at a certain school is 30 to 1. If the student enrollment were to increase by 50 students and the number of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?
- A shipping clerk has five boxes of different but unknown weights each weighting less than 100 kg. The clerk weights the boxes in pairs. The weights obtained are 110, 112, 113, 114, 115, 116, 117, 118, 120 and 121 kg. What is the weight of the heaviest box?
- Jasim went for shopping and spent 1/3 of his money for a bat and another Tk 5 for a ball. If Jasim still had 1/2 of his money left, how much money did Jasim have originally?
- এক ব্যক্তি তার স্ত্রী চেয়ে ৩ বছরের বড়। তার স্ত্রী বয়স তার ছেলের বয়সের ৪ গুন। ৪ ছর পর ছেলের বয়স হবে ১২ বছর। ঐ ব্যক্তির বর্তমান বয়স কত বছর?
- A' B' এর চেয়ে দ্বিগুণ কাজ করতে পারে; তারা দু’জন একত্রে একটি কাজ ১৪ দিনে শেষ করতে পারে। 'A' একা কাজটি কতদিনে করতে পারবে?
- ২২, ২১, ২৩, ২২, ২৪, ২৩, ... পরবর্তী সংখ্যা কোনটি?
- যদি দুইজন টাইপিস্টের দুই পৃষ্ঠা টাইপ করতে দুই মিনিট সময় লাগে তাহলে ছয় মিনিটে আঠার পৃষ্ঠা টাইপ করতে কতজন টাইপিস্ট লাগবে?
- একটি দ্রব্য ক্রয়মূল্যের সমান লাত করায় বিক্রয়মূল্য পাওয়া গেল ৫৬০ টাকা। দ্রব্যটির ক্রয়মূল্য কত?
- A lady went shopping and bought one red bag and 15 black bags. The cost of the red bag was 3 times the average cost of a black bag. If she had spent a total of TK X fir the bags, what was the cost of the red bag?(in terms of x)
- One angle of triangle is four times the second angle and the third angle is 6 degrees more than the second angle. The second angle, in degrees, is
