# 3i Infotech Papers: Sample Questions 28 - 30 of 1245

Examrace Placement Series prepares you for the toughest placement exams to top companies.

## Question number: 28

### Write in Short

A person walking of his usual rate is 40 minutes late. What is his usual time?

### Explanation

Person is walking of his usual speed.

So, he will take of time his usual time.

Let, usual time of person is x hours.

So,

x = 3 hours 20 minutes

So, usual time of person is 3 hours and 20 minutes.

## Question number: 29

MCQ▾

### Question

In simple interest what sum amounts of Rs. 1120 in 4 years and Rs. 1200 in 5 years?

### Choices

Choice (4) Response

a.

Rs. 800

b.

Rs. 900

c.

Rs. 600

d.

Rs. 500

a.

### Explanation

We are asked to find the sum that amounts to Rs. 1120 in 4 years and 1200 in 5 years.

So, interest for one year is Rs. 80.

Same way, interest for 4 years will be Rs.

From 1120 Rs. Subtracting the interest for 4 years we can find the sum or principal money.

So, principal

So, principal Rs.

So, Rs. 800 amounts to Rs. 1120 in 4 years and Rs. 1200 in 5 years.

## Question number: 30

MCQ▾

### Question

A company contracts to paint 3 houses. Mr. Brown can paint a house in 6 days while Mr. Black would take 8 days and Mr. Blue 12 days. After 8 days Mr. Brown goes on vacation and Mr. Black begins to work for a period of 6 days. How many days will it take Mr. Blue to complete the contract?

### Choices

Choice (4) Response

a.

7

b.

8

c.

12

d.

11

d.

### Explanation

A company contracts to paint 3 houses.

Mr. Brown can paint a house in 6 days. So, he will take 18 days to paint all 3 houses.

Mr. Black can paint a house in 8 days. So, he will take 24 days to paint all 3 houses.

Mr. Blue can paint a house in 12 days. So, he will take 36 days to paint all 3 houses.

Mr. Brown alone works for 8 days.

So, in 8 days he has completed amount of work.

Then Mr. Black started working for 6 days.

So, in 6 days he has completed amount of work.

So, total amount of work is completed.

Yet, work is remaining.

1/36 amount of work can be completed by Mr. Blue in one day.

Then, 11/36 amount of work can be completed by him in how many days.

So, Mr. Blue will take 11 days to complete the contract.