TCS Papers: Sample Questions 121 - 123 of 502

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Question number: 121

» Aptitude

Short Answer Question▾

Write in Short

What is the unit of ?

Explanation

  • SI unit of momentum:
  • SI unit of velocity:
  • SI unit of force:
  • SI unit of time: s
  • We are asked to find the SI unit of
  • Computing this, meter/second will remain.
  • is the SI unit of velocity.

Question number: 122

» Aptitude

MCQ▾

Question

The current of a stream runs at 1km/hr. A motor boat goes 35 km upstream and back again to the starting point in 12 hours. What will be the speed of motor boat in still water?

Choices

Choice (4) Response

a.

8.5 km/hr

b.

7 km/hr

c.

8 km/hr

d.

6 km/hr

Answer

d.

Explanation

  • Speed of stream = 1km/hr
  • Motor boat goes 35 km upstream and downstream in 12 hours.
  • Let the speed of motor boat be x km/hr

So,

  • So, possible value of motor boat’s speed can be 6 km/hr.

Question number: 123

» Aptitude

Short Answer Question▾

Write in Short

The ages of two friends is in the ratio 6: 5. The sum of their ages is 66. After how many years will the ages be in the ratio 8: 7?

Explanation

  • Ratio of ages of two friends is 6: 5
  • Let their ages be 6x and 5x.
  • Sum of their ages is 66, i. e.

  • Their ages will be, and respectively.
  • We are asked to find after how many years ratio of their ages will be 8: 7
  • We can write,

  • So, after 12 years ratio of their ages will be .