3i Infotech Papers: Sample Questions 28  30 of 1245
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Question number: 28
» Aptitude
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
» Aptitude
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 

Answer
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
» Aptitude
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 

Answer
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.