Bank PO Questions


Q:

The diagonal of a rectangle is  cm and its area is 20 sq. cm. The perimeter of the rectangle must be:

A) 18 B) 28
C) 38 D) 48
 
Answer & Explanation Answer: A) 18

Explanation:

 (or)   {\color{Black} l^{2}+b^{2}=41}

Also, 

{\color{Black} (l+b)^{2}=l^{2}+b^{2}+2lb}

          = 41 + 40 = 81

(l + b) = 9.

Perimeter = 2(l + b) = 18 cm.

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103 7023
Q:

At what time between 5 and 6 o' clock are the hands of a 3 minutes apart ?

A) 24min B) 12min
C) 13min D) 14min
 
Answer & Explanation Answer: A) 24min

Explanation:

In this type of problems the formuae is
(5*x+ or - t)*12/11
Here x is replaced by the first interval of given time. Here x is 5.
t is spaces apart

 

Case 1 : (5*x + t) * 12/11

(5*5 + 3) * 12/11

28 * 12/11 = 336/11=  min

therefore the hands will be 3 min apart at 31 5/11 min past 5.

 

Case 2 : (5*x - t) * 12/11

(5*5 -3 ) * 12/11

 22 *12/11 = 24 min

 therefore the hands will be 3 min apart at 24 min past 5

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17 6524
Q:

A wire can be bent in the form of a circle of radius 56cm. If it is bent in the form of a square, then its area will be

A) 7744 B) 8844
C) 5544 D) 4444
 
Answer & Explanation Answer: A) 7744

Explanation:

length of wire = {\color{Blue}2 \Pi r}= 2 *(22/7 )*56 = 352 cm
side of the square = 352/4 = 88cm
area of the square = 88*88 = 7744sq cm

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19 6505
Q:

A watch which gains 5 seconds in 3 minutes was set right at 7 a.m. In the afternoon of the same day, when the watch indicated quarter past 4 o'clock, the true time is:

A) 4pm B) 5pm
C) 6pm D) 7pm
 
Answer & Explanation Answer: A) 4pm

Explanation:

Time from 7 am to 4.15 pm  = 9 hrs 15 min =  hrs

 

3 min. 5 sec. of this clock = 3 min. of the correct clock.

Now 3min.5sec. is hrs of this clock = 3 min.is hrs of the correct clock

 hrs of clock =  hrs of the correct clock.

  = 9 hrs of the correct clock.

 The correct time is 9 hrs after 7 am. i.e., 4 pm.

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28 6429
Q:

 If log 2 = 0.30103, Find the number of digits in 256 is

A) 17 B) 19
C) 23 D) 25
 
Answer & Explanation Answer: A) 17

Explanation:

{\color{Black}\log (2^{56})=(56\times0.30103) } =16.85768.

Its characteristics is 16.

Hence, the number of digits in {\color{Black}2^{56} } is 17.

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13 6275