Rubel can do a job in 8 days, and his son can do it in 12 day. How long would it take them to do the job if they worked together?
A. 4.8
B. 5
C. 10
D. 15
CUUnit-Cসাধারণ গণিতবীজগণিতীয় রাশিবাস্তব সংখ্যা (মূলদ, অমূলদ, আবৃত্ত দশমিক) (Topic Practice)CU - ⚡ অনলাইন প্রশ্নব্যাংক দেখুন 💥
সঠিক উত্তরঃ
A.
4.8
Explanation:
Related Questions (Any University/Year)
- If you add up the digits of a three -digit number you get 18 . The ten's digit is twice the hundred's digit and the hundred's digit is 13 the unit's digit. What is the number?
- If x<-1, then which of the following must be true?
- ২ সংখ্যাটি কি সংখ্যা?
- How many prime numbers ( মৌলিক সংখ্যা ) are there from 1 to 10?
- How many numbers from 11 to 50 are there which are exactly divisible by 7 not by 3?
- ভাজক ভাগফলের ১০ গুণ ভাজক ০.৫ হলে ভাজ্য কত?
- If p =35, q=79 and r =57 , then
- A student has to obtain 33% of the total marks to pass. He got 125 marks and failed by 40 marks. The maximum marks are :
- ০.০১ × ০.০০১ × ০.০০০১ × ০ = কত?
- ০.০০০১ এর বর্গমূল কত?
- ৪৩ থেকে ৬০ এর মধ্যে মৌলিক সংখ্যা কোনটি?
- The sum of four consecutive two-digit odd numbers, when divided by 10, becomes a perfect square. Which of the following can possibly be one of these four numbers?
- একটি সংখ্যা ৭৪২ থেকে যত বড় ৮৩০ থেকে তত ছোট । সংখ্যাটি কত?
- 0.৫ x 0.৭ x ২ = কত?
- The ratio of two number is 2:3 The sum of the number is 100. The diffrence between two numbers is-
- A can do a piece of work in 10 days, B can do the same in 30 days and C in 60 days. If A is assisted on alternate days by B and C, in how many days would the work get completed?
- ২×৩×০.৫১.৫=?
- In the last week of a month , a car dealer sold 12 cars .A new sales promotion came out the first week of the next month and he sold 19 cars that week . what was the percent increase in sales form the last week of the previous month compared to the first week of the next month ?
- The decimal 0.1 is how many times greater than decimal (0.001)3?
- দুটি সংখ্যার ল.সা.গু 84 এবং গ.সা.গু 14. একটি সংখ্যা অপর সংখ্যার তৃতীয়াংশ হলে ছোট সংখ্যাটি কত?