Bill can hammer 20 nails in 6 minutes. Jeff can do the same job in only 5 minutes. How long will it take them to finish if Bill hammers the first 5 nails, then Jeff hammers for 3 minutes then Bill finishes the job?
A. 4.6 minutes
B. 5.0 minutes
C. 5.4 minutes
D. 5.8 minutes
E. 6.0 minutes
সঠিক উত্তরঃ
C.
5.4 minutes
Explanation:
Related Questions (Any University/Year)
- স্কুলের পিটিতে নবম শ্রেণির 45 জন ছাত্রের একটি লাইনে শুরু থেকে সপ্তম স্থানে দাঁড়িয়ে আছে অনিক এবং পিছন থেকে সপ্তম স্থানে দাড়িয়ে আছে মোকসেদ। অনিক এবং মোকসেদের মাঝে কতজন ছাত্র দাঁড়িয়ে আছে?
- A machine is producing 800 units per minute. If its productivity falls by a half percent, how many units will it produce now?
- The foot of a ladder is 2m away from a vertical wall. The height of the top of the ladder is ½ m less than the length of the ladder. What is the length of the ladder?
- এক কিলোমিটার এক মাইলের কত অংশের সমান?
- In a group of four people, the heights of the group members are 5 feet 4 inches, 5 feet. 5 feet 6 inches, and 4 feet 10 inches. The average height of the group members is
- If P and Q are positive integers, which CANNOT be the greatest common divisor of P and Q?
- A woman was 30 years old when her daughter was born. Her age is now 6 years more than three times her daughter's age. How old will be the daughter in 10 years?
- A salesman makes a 20 percent commission on the selling price of each set of encyclopedias he sells. If he sells 12 identical sets of encyclopedias and makes $1,800 in commissions, what is the selling price of each set?
- ৪টি গরু ৪ দিনে ৪ বালতি দুধ দিলে, কত দিনে ৮ টি গরু ৮ বালতি দুধ দিবে?
- A bus use one gallon of petrol to travel 15 km. After a tune- up ,the bus travels 15% farther on one gallon .How many gallon of petrol will it take or the bus to travel 150km after tune up?
- Find the average of all whole numbers between 1 and 100 that end in 3.
- Which of the following is true?
- It takes 27 seconds and 17 seconds for two trains to cross a stationary man on the platform in reverse. If two trains take 23 seconds to cross each other, what is the speed ratio?
- Rokon, Saim and Nafisa had ate at MCafe. Nafisa's meal cost 50% more than Saim's meal and Rokon's meal cost 5/6 as much as Nafisa's meal. If Saim paid Tk. 1000 for his meal, what was their total lunch bill?
- The average weekly salary per head of all employees is tk .1000 (Supervisors and labours). the average weekly per head salary of all supervisors is TK. 6000 while the average weekly salary per head of all labours is TK .750 ,if there are 840 labours in it find the number of supervisors
- Instructions: DO NOT USE CALCULATOR. Figures are not drawn to scale. If x and y are positive integers and \(\frac{1}{x} + \frac{1}{y} = \frac{1}{9}\), what is the difference between the maximum and minimum value of x?
- A recipe calls for 1/2 tea spoon off coriander and serves four people. If salma wants to serve the recipe to 24 people, how much coriander will she need?
- Mother's age today is thrice as her daughter's . After 10 years it would be just double. How old is the daughter today?
- Raisa took one cup of half olive-oil and half vinegar and poured it in a jar that had equal parts of olive-oil, vinegar, and water. If the result is a three-cup mixture of salad dressing, what portion of the dressing is olive-oil?
- In the figure above area of the inscribed rectangle is 32. The circumference of the circle is-