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Q:

A boat covers 63 km upstream in 9 hours and covers the same distance downstream in 7 hours . What is the speed (in km/ hr) of the boat in still water?

A) 8.7	B) 8.5
C) 7	D) 8

Answer & Explanation Answer: D) 8

Explanation:

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Filed Under: Boats and Streams

Q:

Speeds of a boat along the current and against the current are 14 km/hr and 7 km/hr respectively. What is the speed of boat (in km/hr) in still water?

A) 3.5	B) 7.5
C) 10.5	D) 9.5

Answer & Explanation Answer: C) 10.5

Explanation:

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Filed Under: Boats and Streams
Exam Prep: Bank Exams

Q:

Dry distillation of calcium formate gives

A) HCOOH	B) CH3COOH
C) HCHO	D) CH3CHO

Answer & Explanation Answer: C) HCHO

Explanation:

Dry distillation of calcium acetate and calcium formate leads to the formation of aldehydes and ketones.

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Q:

Which generation of computer is still under development?

A) 5th	B) 4th
C) 3rd	D) 2nd

Answer & Explanation Answer: A) 5th

Explanation:

5th generation of computers are still under development depending on the artificial intelligence.

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Q:

A boat can move 5 km/hr in still water. If the river is running at 1 km/hr, it takes it 75 min to move to a place and back. How far is the place?

A) 3 kms	B) 5 kms
C) 6 kms	D) 4 kms

Answer & Explanation Answer: A) 3 kms

Explanation:

Let the place be at a distance of 'd' kms

From the given data,

$\frac{d}{5 - 1} + \frac{d}{5 + 1} = \frac{75}{60} kms \frac{d}{4} + \frac{d}{6} = \frac{5}{4}$

5d/12 = 5/4 => d = 3 kms.

Hence, the place is 3 kms far.

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Filed Under: Boats and Streams
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Q:

If the boat goes 7 kms upstream in 42 min and speed of the stream is 3 kmph, then the speed of the boat in still water ?

A) 14 kmph	B) 13 kmph
C) 12 kmph	D) 11 kmph

Answer & Explanation Answer: B) 13 kmph

Explanation:

Given that, upstream distance = 7 kms

Upstream speed = 7/42 x 60 = 10 kms

Speed of the stream = 3 kmph

Let speed in still water = M kmph, then

Upstream speed = M - 3 = 10

=> M = 13 kmph.

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Q:

Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.

What are they?

Answer

They are teeth.

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Subject: Word Puzzles Exam Prep: GRE , GATE , CAT , Bank Exams , AIEEE
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Q:

I have two bodies joined together as one. When standing still. I ran and ran. What am I?

Answer

An Hourglass has two bodies joined together on standing still it ran from one to the other.

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