3i Infotech Papers: Sample Questions 23  24 of 1245
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Question number: 23
» Aptitude
Question
A postal truck leaves its station and heads for Chicago, averaging 40mph. An error in the mailing schedule is spotted and 24 minutes after the truck leaves, a car is sent to overtake the truck. If the car averages 50mph then how long will it take to catch the postal truck?
Choices
Choice (4)  Response  

a.  3 hours 

b.  1.5 hours 

c.  1.6 hours 

d.  2 hours 

Answer
d.Explanation
A postal truck leaves the station and heads for Chicago, averaging 40 mph.
An error in the mailing schedule is spotted and 24 minutes after the truck leaves, a car is sent to overtake the truck. The speed of car is 50mph.
Distance covered by both truck and car is same.
Let time taken by truck is x minutes and car is taking minutes.
So, Car will take 2 hours time to catch the postal truck.
Question number: 24
» Aptitude
Question
If R, S, and Q can wallpaper a house in 8 hours and R and S can do it in 12 hours, how long will it take Q alone to wallpaper the house?
Choices
Choice (4)  Response  

a.  12 hours 

b.  20 hours 

c.  8 hours 

d.  24 hours 

Answer
d.Explanation
R, S and Q together can complete the work in 8 hours.
R and S can do the same work in 12 hours.
We are asked to find the time taken by Q to complete the same work.
Let Q is taking x hours to complete the work.
So, Q alone will take 24 hours to complete the work.