ExamCompetition Forum Question Papers Ask A Question Mock Test Learn & Earn Sign Up Login Menu



0 vote

 A does 4/5 of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

Asked on by | Votes 0 | Views: 73 | Tags: quantitative aptitude     | time and work     | Add Bounty

 A does 4/5 of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

A). 22 ½ days

B). 27 ½ days

C). 32 ½ days

D). 37 ½ days


Share on Facebook      Share on Whatsapp       Share on Twitter




1 answers

0 vote
Answered by on | Votes 0 |

37 ½ days



A alone can finish the work in 20 × 5/4 days = 25 days 

A’s 1 day’s work = 1/25 

A and B together can finish the whole work in 5 × 3 days = 15 days 

Their 1 day’s work = 1/15 

Therefore, B’s 1 day’s work = 1/15 – 1/25 = 1/37 ½ 

Therefore, B alone can finish the whole work in 37 ½ days

Join Telegram Group




Answer This Question

Name:
Email:
Answer :
Sum of (1+1)
Submit:

Other Questions

1.  A can do a piece of work in 5 days and B can do it in 6 days how long will they both work together to complete the work?

2. P and Q can complete a task in 50 and 20 days respectively. In how many days can they complete 70% of the task if they work together?

3. Aman and Barkha together work for 6 days and leave the job. Chandan can do the whole work in 30 days. If the ratio of their efficiency is 3 : 6 : 2, then in how many days can Chandan alone finish the remaining work?

4. 14 men can do a work in 18 days, 15 women can do a work in 24 days. If 14 men work for first three days and 10 women work after that for three days, find the part of work left after that?

5. A is 1.5 times efficient as B therefore takes 8 days less than B to complete a work. If A and B work on alternate days and A works on first day, then in how many days the work will be completed?

6.  The daily wages are increased by 25% and a person now gets Rs 60 per day. What was his previous daily wages (in Rs) ?

7. A pipe can fill a tank in 42 minutes. Because of the leak in the tank, it took 14 minutes more to fill the tank. What is the ratio between the time required for the pipe to fill the tank and time required for the leak to empty the tank?

8. If Vinit can do \(\frac{1}{4}\)th of a work in 3 days and Viraj can do \(\frac{1}{6}\)th of the same work in 4 days, how much will Viraj get if both work together and are paid Rs. 360 in all?

9.  A sum of money is sufficient to pay P’s wages for 25 days or Q’s wages for 30 days. The money is sufficient to pay the wages of both for

10.  Rajesh and Ajay can complete a job in 16 days. Rajesh alone can do it in 24 days. How long will Ajay alone take to finish the whole work?