Subject
Quantitative Aptitude
Topic
Unitary Method
A contractor employed 30 men to do a piece of work in 38 days. After 25 days he employed 5 men more and the work was finished one day earlier. How many days he would have been behind, if he had not employed additional men ?
A contractor employed 30 men to do a piece of work in 38 days. After 25 days he employed 5 men more and the work was finished one day earlier. How many days he would have been behind, if he had not employed additional men ?
ক)
1খ)
\(1\frac{1}{2}\)গ)
\(1\frac{3}{4}\)ঘ)
\(2\frac{1}{2}\)Explanation
Solution: দিন অবশিষ্ট আছে ৩৮ - ২৫ = ১৩ দিন কাজটি ১ দিন আগে শেষ হয়ে যাওয়ায় শেষ অংশের জন্য সময় লেগেছিল ১৩ - ১ = ১২ দিন অতিরিক্ত লোক নিয়োগ করার পর লোকসংখ্যা = ৩০ + ৫ = ৩৫ ৩৫ জন লোক কাজটি শেষ করে = ১২ দিনে , ১ জন লোক কাজটি শেষ করে = ১২ × ৩৫ দিনে , ৩০ জন লোক কাজটি করে = (১২ × ৩৫)/ ৩০ = ১৪ দিনে । সুতরাং অতিরিক্ত লোক নিয়োগ না দিলে সময় বেশি লাগতো ১৪ - ১৩ = ১ দিন ।Related questions
A piece of work can be done by 70 labors in 30 days. How many labors should work daily to complete the work in 12 days ?If it takes 4 hours to dig a hole by 50 workers, how long should it takes to dig the same hole by 30 workers ?One baker can bake either 2 large cakes or 35 small cakes per hour. How many bakers are needed to bake 20 large cakes and 700 small in 3 hours ?If a photocopier makes 2 copied in 1/3 second, at the same rate, how many copies does it make in 4 minutes ?Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?A can do a work in 15 days and B in 20 days. I they work on it together for 4 days, then the fraction of the work that is left is -