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Q:

83% of 2350 = ?

A) 1889.95	B) 1912.35
C) 1875.25	D) 1950.50

Answer & Explanation Answer: D) 1950.50

Explanation:

83% of 2350 = ?

83/100 x 2350

=8.3 x 235

=1950.50

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Filed Under: Percentage
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Q:

Coral Reefs in India can be found in

A) Rameshwaram	B) Trivandrum
C) The coast of Orissa	D) Waltair

Answer & Explanation Answer: A) Rameshwaram

Explanation:

In India Coral Reefs can be found in Rameshwaram.

Coral reefs in India are one of the most ancient and dynamic ecosystems of India. The coral reefs not only provide a sanctuary to a myriad of marine life but also play a key role in protecting the coastline from erosion.

Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals. Coral reefs are built by colonies of tiny animals found in marine water that contain few nutrients.

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Filed Under: Indian Geography
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Q:

A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?

A) 7:4	B) 11:4
C) 4:7	D) 8:3

Answer & Explanation Answer: D) 8:3

Explanation:

Let the speed of the boat upstream be p kmph and that of downstream be q kmph

Time for upstream = 8 hrs 48 min = $8 \frac{4}{5}$ hrs

Time for downstream = 4 hrs

Distance in both the cases is same.

=> p x $8 \frac{4}{5}$ = q x 4

=> 44p/5 = 4q

=> q = 11p/5

Now, the required ratio of Speed of boat : Speed of water current

= $\frac{q + p}{2} : \frac{q - p}{2}$

=> (11p/5 + p)/2 : (11p/5 - p)/2

=> 8 : 3

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Filed Under: Boats and Streams
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Q:

What is the difference between Thermal Energy and Heat Energy?

Answer

Energy tranfer takes place either by means of Heat or Work only in Thermodynamics.

Heat :: Heat Energy is defined as Energy that can be transferred due to temperature change.

Whereas

Thermal Energy :: Thermal Energy is the Internal Energy stored in the system maintained at a certain Temperature.

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Subject: Physics Exam Prep: AIEEE , Bank Exams
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Q:

10 25 45 54 60 75 85

Find the Odd Number?

A) 54	B) 10
C) 45	D) 85

Answer & Explanation Answer: A) 54

Explanation:

In given Series, all the numbers except 54 are multiples of 5.

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Filed Under: Odd Man Out
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Q:

The First Mechanical Computer Designed by Charles Babbage was called?

A) Super Computer	B) Abacus
C) Calculator	D) Analytical Engine

Answer & Explanation Answer: D) Analytical Engine

Explanation:

Computer was invented by Charles Babbage.

The First Mechanical Computer Designed by Charles Babbage, a British mathematician was called as Analytical Engine which resembles today's modern machines between 1833 and 1871.

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Filed Under: Computer
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Q:

The average age of a class is 19 years. While the average age of girls is 18 and that of boys is 21. If the number of girls in the class is 16, Find the number of Boys in the class?

A) 12	B) 10
C) 8	D) 6

Answer & Explanation Answer: C) 8

Explanation:

Let the number of boys = x

From the given data,

=> [21x + 16(18)]/(x+16) = 19

=> 21x - 19x = 19(16) - 16(18)

=> 2x = 16

=> x = 8

Therefore, the number of boys in the class = 8.

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Filed Under: Average
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Q:

A shopkeeper sold a mobile phone for Rs. 12000. Had he offered discount of 10% on the selling price, there would be a loss of 4%. What is the cost price of that Mobile phone?

A) Rs. 12,500	B) Rs. 11,250
C) Rs. 12,750	D) Rs. 11,680

Answer & Explanation Answer: B) Rs. 11,250

Explanation:

Given that SP = Rs. 12000 - 10% = Rs. 10,800

Loss% = 4

We know that, C.P = 100/(100 - Loss%) x 100

=> 100/100-4 x 10800

=> 1080000/96

C.P = Rs. 11,250

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Filed Under: Profit and Loss
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