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Q:

A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?

A) 2.87 sec B) 3.44 sec
C) 4.65 sec D) 5.41 sec
 
Answer & Explanation Answer: B) 3.44 sec

Explanation:

It is launched vertically with an initial speed of 110 ft/sec.

It will reach maximum height when the speed drops to 0.

Vo=110 feet per second 

ho=2 feet 

So, h(t) = -16t^2 +110t +2 

Take the derivative: h'(t) = 110 -32t 

The maximum height will be at the inflection when the derivative crosses the x-axis, then h'(t)=0. 

So, set h'(t)=0 and solve for t: 

0 = 110 -32t 

-110 = -32t 

t=3.4375 

t=3.44 seconds.

 

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Filed Under: Physics
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

3 6069
Q:

Select the synonym of

dependant

A) absolute B) reliant
C) autonomous D) nonpartisan
 
Answer & Explanation Answer: B) reliant

Explanation:
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Filed Under: English
Exam Prep: Bank Exams

0 6065
Q:

STEP is the abbreviated name of the welfare programme to help

A) Children B) Woman
C) Farmers D) Senior citizens
 
Answer & Explanation Answer: B) Woman

Explanation:
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Filed Under: Indian Economy

15 6062
Q:

Country that was called as Land of Rising Sun

A) Russia B) Japan
C) Korea D) Holland
 
Answer & Explanation Answer: B) Japan

Explanation:
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Filed Under: General Awareness

21 6062
Q:

What kind of attempts is made by individuals to obtain confidential information from a person by falsifying their identity  ?

A) Spyware scams B) Phishing scams
C) Computer viruses D) None
 
Answer & Explanation Answer: B) Phishing scams

Explanation:
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Filed Under: Computer
Job Role: Bank Clerk

15 6060
Q:

What number should be Replaced ?

19113682_1335002436606857_8814713213200837998_n1499843587.jpg image

A) 15 B) 17
C) 10 D) 6
 
Answer & Explanation Answer: D) 6

Explanation:

Sum of numbers in the outer circle in before Arc should come in inner circle patterns in the clock wise direction next Arc.

i.e, 9+6 = 15 comes in next arc of inner circle

7+3 = 10 comes in next arc of inner circle

In the same way, 4+2 = 6 comes in place of '?'.

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Filed Under: Logic Puzzles
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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13 6059
Q:

 What is the full form of GSLV ?

A) Ground Satellite Launching Vehicle B) Geosynchronous Satellite Launching Vehicle
C) Gravity synchronous Launching Vehicle D) Group satellite Launching vehicle
 
Answer & Explanation Answer: B) Geosynchronous Satellite Launching Vehicle

Explanation:
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Filed Under: General Awareness

10 6057
Q:

Prithvi spent Rs.89,745 on his college fees, Rs 51,291 on Personality Development Classes, and the remaining 27% of the total amount he had as cash with him. What was the total amount?

A) Rs.1,85,400 B) Rs.1,89,600
C) Rs.1,91,800 D) Rs.1,93,200
 
Answer & Explanation Answer: D) Rs.1,93,200

Explanation:
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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
Job Role: Bank PO

19 6053