Aptitude and Reasoning Questions

Q:

A boat travels 24 km upstream in 6 h and 20 km downstream in 4 h. then, the speed of a boat in still water and the speed of current are respectively

A) 4.5 km/h and 3 km/h B) 4.5 km/h and 0.5 km/h
C) 4 km/h and 2 km/h 5 km/h and 2 km/h D) 5 km/h and 2 km/h
 
Answer & Explanation Answer: B) 4.5 km/h and 0.5 km/h

Explanation:

Distance travelled by boat in upstream=24km

Time taken = 6 h

Speed of the boat in upstream = 24/6 = 4 km/h

And distance travelled by boat in downstream = 20 km

Time taken = 4h Speed of the boat in downstream = 20/4 km/h = 5 km/h

Now, speed of the boat in still water = 1/2 [ speed of the boat in upstream + speed of the boat in downstream] =1/2 [4 + 5] = 1/2 × 9 = 4.5 km/h

And speed of the current = 1⁄2 [speed of the boat in downstream – speed of the boat in upstream] = 1/2 [5 – 4] = 1/2 × 1 = 0.5 km/h

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Filed Under: Boats and Streams
Exam Prep: Bank Exams

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Q:

When Amar walk from P to Q and return from Q to P on cycle, it takes him 29 minutes. By walking both ways, it takes him 49 minutes. If he rides cycle both ways then what will be the total time (in minutes)?

A) 9 B) 11
C) 13 D) 15
 
Answer & Explanation Answer: A) 9

Explanation:
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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

A bus travels 720 km in 20 hours. Calculate its average speed in meters/second.

A) 12 B) 15
C) 18 D) 10
 
Answer & Explanation Answer: D) 10

Explanation:
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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is:

A) 161 B) 162
C) 163 D) 164
 
Answer & Explanation Answer: B) 162

Explanation:
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Filed Under: Average
Exam Prep: Bank Exams

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Q:

A man was 32 years of age when he had his first son. His wife was 35 years of age when his son attained the age of 7 years. The difference between the age of the father and the mother is _____

A) 7 years B) 3 years
C) 5 years D) 4 years
 
Answer & Explanation Answer: D) 4 years

Explanation:
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Filed Under: Problems on Ages
Exam Prep: Bank Exams

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Q:

If xy = -18 and x2+ y2= 85, then find the value of (x + y).

A) 8 B) 10
C) 9 D) 7
 
Answer & Explanation Answer: D) 7

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

The simplest value of 38-212+20318-227+45 is

A) 3/2 B) 2/3
C) 1/3 D) 2
 
Answer & Explanation Answer: B) 2/3

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Filed Under: Simplification
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Q:

In the following question, select the odd letters from the given alternatives.

A) JGD B) NLI
C) XUR D) QNK
 
Answer & Explanation Answer: B) NLI

Explanation:
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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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