# 3i Infotech Papers: Sample Questions 23 - 24 of 1245

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

## Question number: 23

MCQ▾

### 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

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

MCQ▾

### 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

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.