Aptitude [TCS Placement]: Sample Questions 92 - 93 of 174

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Question 92

Question MCQ▾

If a man can swim downstream at 6kmph and upstream at 2kmph, his speed in still water is:

Choices

Choice (4)

a.

4kmph

b.

2kmph

c.

2.5kmph

d.

3kmph

Edit

Answer

a.

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 93

Question MCQ▾

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)

a.

450

b.

225

c.

270

d.

Question does not provide sufficient data or is vague

Edit

Answer

b.

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.