A and B together can paint a wall in 3 days . A can do it alone in 5 days . How many days would it take B to do this job alone ?
A. 0.2
B. 7.5
C. 5.0
D. 6.4
E. None of these
সঠিক উত্তরঃ
B.
7.5
Explanation:
Related Questions (Any University/Year)
- Of the fruit that arrives at a cannery, 20 percent by weight is rejected before processing. Of the fruit that is processed, 15 percent by weight is rejected be fore canning. Of the fruit that arrives at the cannery, what percent by weight is canned?
- A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present?
- If 75% students of a class answered the first question in a test correctly, 55% answered the second question correctly and 20% answered neither of the questions correctly, what percent answered both the questions correctly?
- Four subjects ---physics, Chemistry, Mathematics and Biology ---were taught in four consecutive periods of one hour each starting from 8.00 a.m. At what time was the chemistry period scheduled? 1. Mathematics period ended at 10.00 a.m, which was preceded by Biology. 2. Physics was scheduled in the last period. 3. Mathematics period was immediately followed by Chemistry.
- দুটি বৃত্ত যদি পরস্পর স্পর্শ করে তবে কেন্দ্রস্থ হতে স্পর্শ বিন্দুগামী সরলরেখা দুটির অন্তর্ভুক্ত কোণ ---
- 2n+1-2n= কত ?
- ১ ইঞ্চিতে কত সেন্টমিটার ?
- If A : B= 1 : 2, B : C = 4 : 3 and A + B + C = 450, what is the value of B?
- একজন বিক্রেতা একটি বই এর বিক্রয় মূল্যের উপর ৫% ছাড় দিয়ে ক্রয়মূল্যের উপর ২৫% লাভ করলো। যদি ঐ বই এর ক্রয় মূল্য ৩৮০ টাকা হয়ে থাকে তবে ঐ বই এর বিক্রয় মূল্য কত টাকা লেখা ছিল?
- Find the circumference of a circle whose diameter is 16cm. Use 3.14 for π
- শতকরা ৬টাকা হার সুদে কত বছরে ৫০০ টাকা সুদে মূলে ৮০০ টাকা হয়?
- Kamal weights twice as much as Momen. Momen's weight is 70% of Babu's weight. Dipu weights 50% of Lipu's weight . Lipu weights 180% of Kamal's weight. Who weights the least ?
- ১৩÷৪৫×৩৪= কত ?
- 1+2+3+4+------+19= কত?
- দুই অংকবিশিষ্ট কোন সংখ্যার অংকদ্বয়ের সমষ্টি ৯ । অংক দুটি স্থান বিনিময় করলে যে সংখ্যা পাওয়া যায়, তা প্রদত্ত সংখ্যা হতে ৪৫ কম । সংখ্যাটি কত হবে ?
- -5 এবং |5|-এর মধ্যে দূরত্ব কত একক?
- The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x and y is 10. What is the value of y?
- A cake is divided into 18 pieces. If Rehana takes 1/3 of the cake and Rahim takes 1/3 of the rest that are left, how may pieces are still left?
- A car driver's income consists of his salary and tips. His salary is Tk. 50 a week. During one week his tips were 5/4 of his salary. What fraction of his income for the week came from tips?
- There are 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks. how many possible selections of 4 books form this shelf include at least 1 paperback book?