A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, in how many days they can complete the work?

Asked by Last Modified  

15 Answers

Follow 0
Answer

Please enter your answer

Best Institute For Competitive Exams

22.5 days
Comments
Dislike Bookmark

Math and Science

If A takes x days then B takes 3x days given 3x-x=60 or x=30 So A takes x=30 & B takes 3x=90 days to complete the work. When A & B work together then days is (A days*B days)/(A days +B days) =(30*90)/(30+90)=22.5days
Comments
Dislike Bookmark

If A can finish work in x days, B takes x+60 Days. So their rate of work is 1/x and 1/(x+60) respectively. Further, 1/x = 3 (1/x+60). So, x = 30. If they work together, their rate of work is 1/30 + 1/90 = 1/22.5. So they take 22.5 days to finish the work.
Comments
Dislike Bookmark

Trainer

Efficiency ratio of A to B = 3:1 Ratio of Time required to complete job for A to B= 1:3 A's 1 day's work = 1/30 B's 1 day's work = 1/90 (A + B)'s 1 day's work = 1/30 + 1/90 = 4/90 = 2/45 A and B together can do the work in 45/2 = 22 1/2 days.
Comments
Dislike Bookmark

Engineering Professional & Trainer with more than 20 Years of Teaching Experience

if A can complete the work in 1 day,B can able to complete in 3 days. Therefore the ratio of A to B is 1:3 The difference is 3 - 1 = 2 days if difference of time is 60 days, B takes (3/2 x 60)= 90 days. A work for 1/30 days B work for 1/90 days Therefore(1/30+1/90)=2/45 i.e 22 1/2 days
Comments
Dislike Bookmark

Aptitude Trainer

Efficiency of A and B is 3:1 So no.of days they will take to complete a work is in the ratio of 1:3 as we know that efficiency is indirectly proportional to no.of days. If we assume No.of days taken by a is 1X days then for B it is 3X days. Difference b/w A & B is i.e. 3X-X=60 2X=60 X=30 The...
read more
Efficiency of A and B is 3:1 So no.of days they will take to complete a work is in the ratio of 1:3 as we know that efficiency is indirectly proportional to no.of days. If we assume No.of days taken by a is 1X days then for B it is 3X days. Difference b/w A & B is i.e. 3X-X=60 2X=60 X=30 The answer is A will take 30 Days and B will take 90 days to finish the work. read less
Comments
Dislike Bookmark

Learn Mathematics from an IITian

22.5 days
Comments
Dislike Bookmark

Advanced maths

22-1/2 DAYS
Comments
Dislike Bookmark

Maths antd QT Teacher

sorry, 22.5 days
Comments
Dislike Bookmark

Quant techniques

a:b=3:1,2parts=60 days, 4parts=30 days.
Comments
Dislike Bookmark

View 13 more Answers

Related Questions

How much time is required to learn Short tricks in quantitative aptitude
It depends on the teacher and your grasping power, your educational background and your effort on an average it varies from 3 - 6 months.
Shailesh
A hunter walked one kilometer south from his camp. Then he walked one kilometer west. There he shot a bear. Then he walked one kilometer north, and found that he was back at his camp. What color was the bear?
Obvious answer is that it's white, but it's not guaranteed. And by walking like that he wouldn't get back to his camp.
Learn Unwired
How to improve quantitative aptitude?
Solve more and more problems or better get trained by a qualified trainer.
Vijay
Which book is better for quantitative aptitude - R. S. Aggarwal or Quicker Maths?
R. S. Aggarwal
Varada
0 0
6
What does Quantitative Aptitude teaches us?
I believe that aptitude is nothing but using our common sense. no need of any other skills.
Jayant

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Percentage | Marks Based Concept

Rahul Verma

0 0
0
Challenging Train Puzzle | Time interval between Trains?

Rajnikant Mishra

0 0
0
Aptitude Puzzle
When the price of wheat was increased by 32%, a family reduced its consumption in such a way that the expenditure on wheat was only 10% more than before. If 30kg were consumed per month before, find the...

Surendra Reddy Ankireddypalli

0 0
0
Calculation Technique | Two Digit Multiplication Technique

Rahul Verma

0 0
0
Permutation & Combination Masterclass | Arrange 9 Books with Restrictions | CAT & GMAT Quant

Rajnikant Mishra

0 0
0

Recommended Articles

Bank P.O Exam Guide

Bank P.O is one of the most talked about examination for bank recruitment in India. P.O stands for Probationary Officer which is an entry level position in banks, which are especially for fresh graduates or a person without any prior experience. The probation period for Bank P.Os is generally 2 years in which they’re trained...

Read full article >

10 Tricks to Remember What You Studied

It is not true that every student is lethargic and loves to be the couch potato. Some students do put immense effort for their examinations. Where some book-worms study day in and out without a break, with an ultimate objective to crack the competitive examination or to score the highest mark. But, the saddest part is that,...

Read full article >

Exam Tips for Students

So, Children your exams are fast approaching & you are facing the jitters? correct? But there is nothing to worry. If you plan your studies well, you can definitely pass your examinations with flying colours. Here are a few simple tips that you can follow: 1. Your school has issued a time table for the exams....

Read full article >

8 Exam Stress Busters That You Can Count On

When exams knock at the door, it is common to go paranoid. First, the constant worry on how you will perform and whether you are preparing right is a major concern. Next, the limited time span and the vast syllabus that you have to complete. Irrespective of the kind of exam you are appearing for, stress is common and happens. If...

Read full article >

Find Quantitative Aptitude Coaching near you
Quantitative Aptitude Coaching in Hyderabad
Quantitative Aptitude Coaching in Bangalore
Quantitative Aptitude Coaching in Delhi
Quantitative Aptitude Coaching in Chennai
Quantitative Aptitude Coaching in Pune
Quantitative Aptitude Coaching in Mumbai
Quantitative Aptitude Coaching in Gurgaon
Quantitative Aptitude Coaching in Kolkata
Quantitative Aptitude Coaching in Coimbatore
Quantitative Aptitude Coaching in Noida

Looking for Quantitative Aptitude Coaching?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you