# 3i Infotech Papers: Sample Questions 72 - 74 of 1245

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## Question number: 72

MCQ▾

### Question

A boat travels 20 kms upstream in 6 hours and 18 kms downstream in 4 hrs. Find the speed of the water current?

### Choices

Choice (4) Response

a.

5 kmph

b.

kmph

c.

kmph

d.

None of the above

b.

### Explanation

Let the speed of boat and speed of water be u and v kmph respectively.

Boat travels 20 km upstream in 6 hours, i. e. ……. (i)

Boat travels 18 km downstream in 4 hours, i. e. ……. (ii)

We are asked to find the speed of water, i. e. v.

Subtracting both the equations,

kmph

So, speed of water will be kmph.

## Question number: 73

MCQ▾

### Question

15 men take 21 days of 8 hrs each to do a piece of work. How many days of 6 hrs each would it take for 21 women if 3 women do as much work as 2 men?

### Choices

Choice (4) Response

a.

30

b.

19

c.

20

d.

29

a.

### Explanation

15 men are taking 21 days of 8 hours to do a piece of work.

Here, it is given that work done by 3 women is equal to work done by 2 men.

We are asked to find in how many days 21 women can complete the same work working 6 hours for a day.

Let the days required by women will be x.

So,

So,

So, 21 women will require 30 days to complete the work if they are working for 6 hours.

## Question number: 74

MCQ▾

### Question

Purpose of PC (Program Counter) in a Microprocessor is

### Choices

Choice (4) Response

a.

Count the number of instructions

b.

To store address of next instruction to be executed

c.

To store base address of the stack

d.

To store address of TOS (Top Of Stack)