Question

Work efficency ration of two men a and b 6:5 and b and c ratio 6:5 .if a compkete work in 2 days then b compkete work in how many days

Answer 1

Answer:

b completes the work in 1 day 16 hours.

Step-by-step explanation:

Let b complete the work in x days.

a:b :: 2:x

6:5 :: 2:x

x = (5*2)/6

x = 5/3

b completes the work in 5/3 days or 1 day 16 hours.

Answer 2

Efficiency Ratio – Work and Time

Ratio

If A is thrice as good a workman as B, then:

The ratio of work done by A and B = 3: 1.
The ratio of times taken by A and B to finish a work = 1 : 3. This means that if someone says A is ‘x’ times as good a workman as B, then he will take the time to B to do the same work.

Browse more Topics under Work And Time

Work from Days

Days from Work

Data Sufficiency

Work And Time Practice Questions

Efficiency

The efficiency of work means, “How much work one person can do in one day (expressed in percentage)”. For example, a person can do a job in 2 days. In other words, we can say that he can do 50% of the work in one day. Therefore, his efficiency will be 50%.

The following two steps can be followed to better utilise the concept of efficiency. This concept involves two steps to calculate efficiency:

Step 1: Convert the work into fraction i.e. per day work.

Step 2: Express the fraction in the form of percentage by multiplying with 100. Let us see this with the help of an example.



Example 1: If a person can complete his work in 5 days. What will be his efficiency?

Answer: Number of days a person takes to complete his work = 5 days.
This means that he is doing 1/5 th of the work per day (Step one – convert into fraction).

Now let us do the second step and convert it into a percentage:

We have: 100/5 = 20%. Therefore, the person’s efficiency is 20%. Summarizing this, we can say that if a person can do his job in n days, his efficiency will be given as below:

Efficiency =(100/n) %.

Let us understand more about Work from Days here in detail 

Negative And Positive Efficiency

Now the efficiency can be negative as well as positive. For example, if we have a man who builds a wall in 10 days, his efficiency will be equal to (100/10)% = 10%. Suppose we also have another man who is demolishing the same wall. he can demolish the entire wall in two days. Therefore his efficiency will be – (100/2)% = – 50%.