Charles can do a job in 1 hour, Bill can do the same job in 2 hours, and Bob can do the job in 3 hours. How long does it take them to do the job working together?
A. 6/11 hours
B. 1/2 hours
C. 6 hours
D. 1/3 hours
E. 1/6 hours
সঠিক উত্তরঃ
A.
6/11 hours
Explanation:
Related Questions (Any University/Year)
- BUP basketball team that has played 2/3 of its games has a record of 17 wins and 3 losses. What is the greatest number of the remaining games that the team can lose and still win at least 3/4 of all of its games?
- Fedora Technologies acquired 60 hard-drives and tried selling them at BDT 2400 apiece at 20 percent markup on cost price. After 3 months, 6 remained unsold and were returned to manufacturer at 50 percent refund of cost. Find out Fedora's approximate profit margin as a percentage of initial acquisition cost of the 60 hard-drives.
- If, x+y>4 and x1 is true
- 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?
- Faruk covers d miles in the first hour,e miles in the second hour and f miles in the third hour what is the average rate for the entire trip?
- The purchase price of an article is Tk. 48. In order to include 15% of cost for overhead and to provide Tk. 12 profit, the mark-up should be:
- What percent of 50 is 15?
- A waiter's salary consists of his salary and tips. During one month his tips were 5/4 of his salary. What fraction of his income came from tips?
- Machine A can produce 40 bolts per minute, whereas machine B can produce only 30 per minute. Machine A begans along to make bolts but it breakdown after 1.5 minute and machine B must complete the job . If the job requires 300 bolts, how long does the whole operation take?
- In Township K each property is taxed at 8 percent of its assessed value. If the assessed value of a property In Township K is increased from $20,000 to $24,000, by how much will the property tax increase?
- If y/x =1/5 and 2x+y=33, then what is the value of x?
- In a class 60% of the students enrolled for Math and 70% enrolled for Economics... what % of the students of the class did not enroll for either of the two subjects?
- Average of 5 consecutive even numbers is 8 which is the smallest of the 5 number----.
- A man starts climbing a 11 m high wall at 5 pm. In each minute he climbs up 1m but slips down 50 cm. At what time will he climb the wall?
- Each of the following problem has a question and two statements which are labeled 1. and. Use the data given in 1. and 2. to decide whether the statements are sufficient to answer the question.Select one of the following . a.Statements (1) ALONE is sufficient,but (2) ALONE is not sufficient. b.Statements (2) ALONE is sufficient,but (1) ALONE is not sufficient. c. Both statement TOGETHER are sufficient but statement alone is sufficient . A worker is hired for six days.He is paid Tk.2 more for each day of work than he was paid for the preceding day of work.How much was he paid for the day of work?
- এক কিলোমিটার এক মাইলের কত অংশের সমান?
- Arif bought 17 pens of three colors black , green and red. They cost Tk 5,Tk 10 and Tk 25 each respectively . The total amount that Arif paid was Th 205. If Arif bought twice as many green pens as red pens ,how many black pens did buy ?
- যদি x+y=৫ এবং x-y=৫ হয়, তাহলে xy এর মান কত?
- 3 persons A,B, C whose salaries together amount Tk 7200 ,spend 80%, 85% and 75% of their salaries respectively .If their savings are 8:9:20 .Find salary of B
- An absent minded scientist walks on an escalator at a rate of 4 steps per second and reaches the other end in 15 seconds. While coming back, walking at the same speed he reaches the starting point in 45 seconds. What is the number of steps on the escalator?
- 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 a man's weekly salary is Tk. P and he saves Tk. M, what friction of his weekly salary does he spend?
- A father is three times as old as his son. In 12 years' time, he will be twice as old as his son. How old is the father now?
- If a boy takes as much time in running 10 min, a car takes in covering 25m, the distance covered by the boy's during the time the car covers 1 km is -
- After working for a total of 4 hours at a temporary job, Shams was told that you had just completed 1/4 of the job. How long should it take you to finish the remaining part of the job?
