# Aptitude [TCS Placement]: Sample Questions 27 - 28 of 174

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## Question 27

Aptitude

### Question

MCQ▾

A girl rows upstream 16 km and downstream 28 km, taking 5 hours each time. What will be the velocity of the current?

Choice (4)

a.

1.8 km/hr

b.

2.4 km/hr

c.

1.2 km/hr

d.

3.6 km/hr

c.

### Explanation

• Speed of downstream

• Speed of upstream

• We are asked to find the velocity of current.
• Velocity of current

• So, velocity of current is 1.2 km/hr.

## Question 28

Aptitude

### Question

MCQ▾

An old man and a young man are working together in an office and staying together in a nearby apartment. The old man takes 30 minutes and the young 20 minutes to walk from apartment to office. If one day the old man started at 10.00 AM and the young man at 10: 05AM from the apartment to office, when will they meet?

Choice (4)

a.

10: 00

b.

10: 15

c.

10: 30

d.

10: 45

b.

### Explanation

• Some distance is covered by old man in 30 minutes while the same distance is covered by young man in 20 minutes.
• Old man is leaving for the office at 10: 00 AM and while young man is leaving at 10: 05 AM.
• We are asked to find the time when they will meet.
• Let they are meeting after x minutes from 10: 00 AM
• As distance covered by them is same,

• So, both will meet after 15 minutes from 10: 00 AM.
• They will meet at 10: 15 AM

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