# TCS Papers: Sample Questions 91 - 93 of 502

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## Question number: 91

MCQ▾

### 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

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

MCQ▾

### 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

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

MCQ▾

### 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