Machine A produces bolts at a uniform rate of 120 every 40 seconds, and Machine B produces bolts at a uniform rate of 100 every 20 seconds. If the two machines run simultaneously, how many seconds will it take for them to produce total of 200 bolts?
A. 22
B. 25
C. 28
D. 32
সঠিক উত্তরঃ
B.
25
Explanation:
Related Questions (Any University/Year)
- On a certai project, the only grades awarded were 745 and 100. If 85 students completed the projects and the average of their grades was 85, how many of them did score 100?
- 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?
- If 25% of x equals 30% of y and 24% of y equals 20% of z, what is the ration of x to z?
- If the cost of a long-distance phone call is P paisa for the first minute and 2/3 P paisa for each additional minute, what is the cost, in paisa, of a 10-minute call of this type?
- Saim is now 14 years older than Siam. In 10 years, Saim will be twice as old as Siam.How old will Saim be in 7 years?
- Long distance phone calls cost ten cents for the first minute plus four cents for each additional minute... Let m equal the total number of minutes.
- The average of a set of 12 numbers which includes 34 is N. If 34 is removed from the set and 38 is added to the set, what is the average of the new set of numbers in terms of N?
- The average salary of Arif and Babu is Tk. 10,000 and that of Sabbir and Babu is Tk. 12,000. What is the difference between Sabbir's salary and Arif's salary?
- ৫-এর কত শতাংশ ৭ হবে------
- একটি পরীক্ষায় ৫২% পরীক্ষার্থী ইংরেজিতে এবং ৪২% পরীক্ষার্থী গণিতে ফেল করল। যদি উভয় বিষয়ে ১৭% ফেল করে তবে কয়জন পরীক্ষার্থী উভয় বিষয়ে পাশ করে?
- A waiter's salary consists of his salary and tips. During one month his tips were 5/4 of his salary. What fraction of his income came from tips?
- If x is an integer and (x^2
- A football team had a ratio of win to loss of 3:1. After winning 6 games in a row. the team's ratio of win to loss became 5:1. How many games had the team won before it won the six games?
- In Township K each property is taxed at 8 percent of its assessed value. If the assessed value of a property In Township K is increased from $20,000 to $24,000, by how much will the property tax increase?
- 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?
- It takes 30 days to fill a laboratory dish with bacteria, If the size of the bacteria doubles each days, how long will it take for the bacteria to fill one-----half of the dish?
- Present age of mother is 4 times the sum of the ages of her two daughters, After 5 years, mothers ages will be twice the sum of the ages of the two daughters, What is the present age of the mother?
- দুইটি ক্রমিক সংখ্যার বর্গের পার্থক্য ১৯। তার মধ্যে একটি সংখ্যার বর্গমূল ৩ হলে অন্যটি কত?
- যদি দুইজন টাইপিস্টের দুই পৃষ্ঠা টাইপ করতে দুই মিনিট সময় লাগে তাহলে ছয় মিনিটে আঠার পৃষ্ঠা টাইপ করতে কতজন টাইপিস্ট লাগবে?
- If the ratio of the radii of two circles is 3 to 2 then the ration of the areas of the two circles.