A teacher has 3 hours to grade all the papers submitted by the 35 students in her class. She gets through the first 5 papers in 30 minutes. How much faster does she have to work to grade the remaining papers in the allotted time?
A. 10%
B. 15%
C. 20%
D. 25%
E. none of these
Explanation: প্রথম 5 টি copy এর প্রত্যেকটি দেখতে সময় লাগে \((30/5) = 6\) মিনিট। পরের 30 টি copy এর প্রত্যেকটি দেখতে সময় লাগবে \((150/30) = 5\) মিনিট। অতএব, \((1/6 \times 100) = 16.67\%\) faster হতে হবে। (None of these).
Related Questions (Any University/Year)
- 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:
- A man has Tk. 192 in one taka, five taka and ten taka notes. If he has equal number of notes of each type, the total number of notes will be.
- In Hotel Sea View, the daily rate for an economic room, which can accommodate a maximum of four people, is Taka 800 for one person and Taka X for each additional person. If 3 friends take the room for one day and each pays Taka. 450 for the room, what is the value of X?
- A person works in a firm on monthly salary basis he gets a fixed amount of increment at the end of each year. His monthly salary is Tk. 3500 at the end of 4th year and Tk. 4250 at the end of 10th year. what was his initial monthly salary?
- If 16% of 40% of a number is 8, the number is :
- What is the value of the quotient (6 x 10⁵)/(2 × 10⁻²)?
- How many liters of a mixture containing 80% alcohol should be added to 5 liters of a 20% solution to yield a 30% solution?
- The average (arithmetic mean) of four different positive integers is 20. What is the greatestpossible value of any of these integers?
- Which of the following is equal to 85 percent of 160?
- লাল ও কালো মিলে একটি বাক্সে ১০টি বল আছে। নিচের কোনটি কোনভাবেই লাল ও কালো বল এর অনুপাত হবে না?
- The least integer of set of consecutive integers is- 25. If the sum of these integers is 26, many integers are in this set?
- If x and y are integers, 13<x<25 and -2>y>-13, what is the greatest possible value of (x -y)?
- In a class of 200 students, forty percent are girls. Twenty-five percent of the boys and 10 percent of the girls signed up for a tour to Cox's Bazaar. What percent of the class signed up for the tour?
- The population of City X is 40% of the population of city Y. The population of city X is what percent of city X and city Y together?
- Asif is now 14 years older than Saif. If in 10 years Asif will be twice as old as Saif. How old will Asif be in 7 years?
- তিনটি মেশিন একটি কাজ যথাক্রমে ৪, ৬ এবং ৮ ঘণ্টায় সম্পন্ন করতে পারে। দুইটি মেশিন সর্বোচ্চ ক্ষমতায় কাজ করে এক ঘণ্টায় কতটুকু কাজ করতে পারবে?
- If s shirts can be purchased for d dollars, how many shirts can be purchased for t dollars?
- At a local appliance manufacturing facility, the workers received a 20% hourly pay raise due to extraordinary performance. If one worker decided to reduce the number of hours that he worked so that his overall pay would remain unchanged, by approximately what percent would he reduce the number of hours that he worked?
- Two workers, working separately but at the same speed, take hours 40 minutes to complete a particular task, How long will one of these two workers take to complete the same task alone?