TCS Papers: Sample Questions 91  93 of 502
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Question number: 91
» Aptitude
Question
A is 20 percent more efficient than B. If two persons can complete a piece of work in 60 days then in how many days A working alone can complete the work?
Choices
Choice (4)  Response  

a.  100 

b.  90 

c.  80 

d.  110 

Answer
d.Explanation
 A is 20 % more efficient than B.
 If B’s per day work is 100 units then A’s per day work will be 120.
 Both persons together complete a day.
 If they work together, they will take 60 days to complete the work. So total work = 60 x 220
 We are asked to find the number of days to complete the work when A alone is working, which will be
 So, A alone will take 110 days to complete the work.
Question number: 92
» Aptitude
Question
If a man can swim downstream at 6kmph and upstream at 2kmph, his speed in still water is:
Choices
Choice (4)  Response  

a.  2.5kmph 

b.  2kmph 

c.  3kmph 

d.  4kmph 

Answer
d.Explanation
 Let the speed of man in still water is u kmph.
 Downstream speed means person is swimming in the direction of water and upstream speed means person is swimming in the opposite direction of flowing water.
 Downstream speed, a = 6 kmph and upstream speed, b = 2 kmph
 Speed of man, u = (a + b) /2
u = (6 + 2) /2
u = 4 kmph
 Man’s speed will be 4 kmph in still water.
Question number: 93
» Aptitude
Question
A sporting goods store ordered an equal number of white and yellow balls. The tennis ball company delivered 45 extra white balls, making the ratio of white balls to yellow balls 1/5: 1/6. How many white tennis balls did the store originally order for?
Choices
Choice (4)  Response  

a.  225 

b.  450 

c.  270 

d.  None of the above 

Answer
a.Explanation
Sporting goods ordered equal number of white and yellow balls, i. e. in the ratio of
Company delivered 45 extra while balls, making ratio of white balls to yellow balls
So, we can say that after 45 more white balls ratio has changed from to .
So, 225 white tennis balls were ordered originally.