Bissoy.com
Doctors Medicines MCQs Q&A

  1. 10 days
  2. 5 days
  3. 9 days
  4. 4 days
7 views

1 Answers

Option 4 : 4 days

Given:

Time taken by Ankit to complete the job = 10 days

Time taken by Bunty to complete the job = 5 days

Time taken by both to complete the job = 9 days

Formula Used:

Work Efficiency = (Total Work)/(Time taken to complete work)

Calculation:

[ alt="short" src="//storage.googleapis.com/tb-img/production/21/06/short.png" style="width: 300px; height: 182px;">

Here,

Total Work = (LCM of 15 & 10)

⇒ 30

So, Efficiency of Ankit = 30/10

⇒ 3

& Efficiency of Bunty = 30/15

⇒ 2

Observe that, Bunty is involved in the work from start to finish.

So, Amount of work done by Bunty in 9 days = Efficiency × Number of days

⇒ 2 × 9 

⇒ 18 

Now, Remaining work = Total work - Work done by Bunty 

⇒ 30 - 18

⇒ 12

This remaining work is done by Ankit before leaving the work.

So, Number of days after which Ankit left the work = (Remaining work)/(Ankit's efficiency)

⇒ 12/3

⇒ 4 days

∴ Ankit left the work after 4 days.

7 views

Related Questions

In the following question, two statements are numbered as A and B. On solving these statements, we get quantities A and B respectively. Solve both quantities and choose the correct option. Quantity A: 20% of students prefer to speak both English and Hindi while 40% of students prefer to speak Hindi and 55% of students prefer to speak English. 1300 students don’t prefer to speak both English and Hindi. Find the difference between the number of students who speak only English and only Hindi. Quantity B: 10 men can complete the work in 20 days while 30 women can complete the work in 40 days. If 8 men and 30 women started the work and they work for 8 days then left the work. The remaining work will be completed by a certain number of women in 57.6 days. Find the number of women who completed the remaining work.?
1 Answers 5 Views
In the following question, two statements are numbered as A and B. On solving these statements, we get quantities A and B respectively. Solve both quantities and choose the correct option. Quantity A: Pipe A takes thrice the time taken by Pipe B to fill a tank. Together they can fill the tank in 15 hours, tank A and B is opened together for 4 hours and then Pipe A is closed and after 2 more hours Pipe B is closed and an outlet Pipe C is opened which when working alone can empty the tank in 10 hours. Calculate the time taken by C to empty the tank. Quantity B: A pipe A can fill the tank in 10 hours another pipe B can fill the tank in 15 hours and with the help of third pipe C they can fill the tank in 5 hours. Pipe A is opened for 4 hours then it is closed, pipe B is closed 3 hours before filling of tank and tank C is opened the whole time. Calculate the time taken to fill the tank?
1 Answers 6 Views