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)
- What is the greatest of consecutive integers Whose sum is 24?
- If a 60 ml of water contains 20% of chlorine, how much water must be added in order to create a 12.5% chlorine solution?
- Ajar contains 10 red marbles and 30 green ones. How many red marbles must be added to the jar so that 60% of the marbles will be red?
- A colony of 15,000 ants increased by 50% after being fed. Then after 4 weeks without food, the number of ants dropped by 60%. What percentage decline did the original population undergo?
- Outside a square garden there is a path of 5 metres width around it, If the area of the path is 500 square metres, what is the area of the garden?
- If y% of x is 29.Then x=?
- X:Y=3:4 হয় 3Y-X:2X+Y কত হবে?
- Ajar contains 10 red marbles and 30 green ones .How many red marbles must be added to the jar so that 60% of the marbles will be red?
- Monti always jogs to school at a speed of 6 kilometers per hour, and walks home along the same route at a speed of 3 kilometers per hour. If he spends exactly one hour total traveling both ways, how many kilometers is his school from his home?
- 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?
- The ratio of Pens and Pencils in a shop is 3 : 2 respectively . The average number of Pens and Pencils is 180. What is the number of Pencils in the shop?
- In a party of 77 people, there are twice as many women as children and twice as many children as men. How many children were present?
- During transportation, 5% merchandise was stolen and another 5% was damaged, At what profit (in percentage) should the goods be sold so as to make an overall profit of 20%
- 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?
- One laptop seller is planning to increase the price/laptop by BDT 10,000 from the next month. Market research shows that with this increase in price he will be able to sell 6 fewer laptops in the next month but the total revenue will increase by BDT 32,000 to BDT 760,000. What is the number of laptops the seller will sell in the next month at this new price?
- ৭২৯ লিটারের মিশ্রণে দুধ এবং মধু ৭ঃ২ অনুপাতে থাকে । এই অনুপাতটি ৭ঃ৩ এ পরিবর্তন করার জন্য এতে কী পরিমাণ মধু মেশাতে হবে?
- P is a set of 5 consecutive integers whose average is 4. Q is a set of 7 consecutive integers whose average is 7. How many numbers of set Q are also members of set P?
- মোহন ও সোহানের বর্তমান বয়সের অনুপাত ২ : ৩ এবং তাদের বয়সের পার্থক্য ১২ বছর। সোহানের বর্তমান বয়স কত?
- 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?
- A rectangular area of 16 meters by 12 meters, is surrounded by a road 3 meters wide. The area of the road is:
- A fruit vendor purchased 35 dozens of apple at TK. 10 per dozen. Out of those, two dozens got rotten and he sold 28 dozens at Tk. 12 per dozen. Remaining apples were sold by him for TA. 15 per dozen. Find the amount of total profit made by the vendor in this business.
- 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?
- The cost of two litres of Oil and its container is taka 100 . If the cost of the container is taka 23 less than the cost of one litre of oil , what is the cost of 1 litre of oil ?
- A machine is producing 800 units per minute. If its productivity falls by a half percent, how many units will it produce now?
- One City-bus charges BDT 'p' for the first half-kilometer of a trip and BDT 'p/8' for each additional half- kilometer. What is the charge for a trip whose distance in kilometers is the whole number 'q'?