# TCS Papers: Sample Questions 78 - 80 of 502

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## Question number: 78

» Aptitude

### Write in Short

A man, a woman and a boy finish work together in 6 days. Man takes 10 days, woman takes 24 days then how much boy will take?

### Explanation

- A man, a woman and a boy together can complete a work in 6 days.
- Man alone takes 10 days while woman takes 24 days to complete the same work.
- Let child takes x days to complete the work.
- Writing this statement into equation form,

1/x + 1/10 + 1/24 = 1/6

1/x = 1/6 – (1/10 + 1/24)

1/x = 1/6 – 17/120

1/x = (20 - 17) /120

1/x = 1/40

x = 40

- Boy will take 40 days to complete the same work.

## Question number: 79

» Aptitude

### Write in Short

A, B, C, and D tells the following times by looking at their watches. A tells it is 3 to 12. B tells it is 3 past 12. C tells it is 12: 02. D tells it is half a dozen too soon to 12. No two watches show the same time. Whose watch shows maximum time?

### Explanation

- Person A tells time is 3 to 12, i. e. time is 11: 57
- Person B tells time is 3 past 12, i. e. time is 12: 03
- Person C tells time is 12: 02
- Person D tells time is half a dozen too soon to 12, i. e. time is 11: 06
- We are asked to find whose watch is showing maximum time.
- By observation we can say watch of person B is showing the maximum time, i. e. 12: 03

## Question number: 80

» Aptitude

### Write in Short

A work is done by two people in 24 min. One of them can do this work a lonely in 40 min. How much time will be required to do the same work for the second person?

### Explanation

- Here, one person can complete the work in 40 minutes, i. e. in one minute he can complete work
- Let second person can complete the work in x minutes, i. e. in one minute he can complete work
- Together they complete work in 24 minutes, i. e. in one minute they can complete work
- In equation form,

- Second person alone can complete work in 60 minutes