TCS Papers: Sample Questions 121  123 of 502
Examrace Placement Series prepares you for the toughest placement exams to top companies.
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 .