A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is:
A. 7/15
B. 8/15
C. 4/15
D. 7/20
E. 4/5
সঠিক উত্তরঃ
B.
8/15
Explanation:
Related Questions (Any University/Year)
- 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?
- Out of a total of 1,000 employees at a certain corporation, 52 percent are female and 40 percent of these females work in research. If 60 percent of the total number of employees work in research, how many male employees do NOT work in research?
- Which Number Should come next in this series? 25,24.22.19,15
- There are 12 fewer girls than twice the number of boys signed up for Rolling Hills Tennis Camp. If 60 girls and boys are signed up for the camp, how many boys are signed up?
- There were n books in a store. After 1/6th of the books were sold and 5 more books were procured, the total number of books in the shop stood at 65. What was the original number of books in the shop?
- ডলার প্রতি ৮৬ টাকা বিনিময় হার এবং গড় পরিবার আকার ৫ ধরা হলে বার্ষিক ২০৬৪ ডলার মাথাপিছু আয় হবে, গড় পরিবার পিছু মাসিক .......... টাকা আয়ের সমান।
- একটি মানচিত্রে ১ ইঞ্চি দূরত্ব ২০ মাইলের সমান। দুটি শহরের মধ্যবর্তী দূরত্ব ৬.২ ইঞ্চি। শহর দুটির প্রকৃত দূরত্ব কত?
- ১০ জনে একটি কাজের অর্ধেক করতে পারে ৭ দিনে। ঐ কাজটি করতে ৫ জনের কত দিন লাগবে?
- Saim is now 14 years older than Siam. In 10 years, Saim will be twice as old as Siam.How old will Saim be in 7 years?
- Half the people on a bus get off at each stop after the first, and no one gets on after the first stop. If only one person gets off at stop number 7, how many people got on the first stop?
- Francis had a average of 75 on her first four Geography tests, After taking the next test, her average dropped to 72. How much did she get in the fifth test?
- The price of sugar increases by 32%. A family reduces its consumption so that expenditure of the sugar is up by 10% only. If the total consumption of sugar before the price rise was 10 kg per month, then the consumption of sugar per month is approximately-
- 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?
- Of the following the closest approximation to V(5.98 x 601.5/15.79)
- A can complete a project in 20 days and B can complete the same project in 30 days. If A and B start working on the project together and A quits 10 days before the project is completed, in how many days will the project be completed?
- In a group of 100 adults, 75 percent of the women are left-handed. If there are 12 right-handed women in the group, how many men are in the group?
- Sadman has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the smaller field has area K, then the area of the larger field is greater than the area of the smaller field by what amount?
- Two motorists start from the same point at the same time... Find the rate of speed for each motorist.
- Ehsan was preparing to make a tape from some of his favourite songs. He noticed that Hadi's song was 1 minute longer than Bonna's song. Duration of Niaj's song was 1 minute shorter than twice the duration of Bonna's song. If the total time for these songs is 12 minutes, how long is Niaj's song?
- A tiger is 50 of its own leaps behinds a deer. The tiger takes 5 leaps per minutes to the deer's 4 leaps. If the tiger and the deer cover 8 m and 5 m per leap respectively, what distance will the tiger have to run before it catches the deer?