# Bank PO Questions

Q:

At what time between 4 and 5 o'clock will the hands of a watch point in opposite directions?

 A) 54 past 4 B) (53 + 7/11) past 4 C) (54 + 8/11) past 4 D) (54 + 6/11) past 4

Answer & Explanation Answer: D) (54 + 6/11) past 4

Explanation:

4 o'clock, the hands of the watch are 20 min. spaces apart.
To be in opposite directions, they must be 30 min. spaces apart.
Minute hand will have to gain 50 min. spaces.
55 min. spaces are gained in 60 min

50 min. spaces are gained in $\frac{60}{55}×50$ min. or $54\frac{6}{11}$

Required time = $54\frac{6}{11}$ min. past 4.

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105 31748
Q:

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning?

Answer

Let the average after 7th inning = x

Then average after 16th inning = x - 3

16(x-3)+87 = 17x

x = 87 - 48 = 39

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31051
Q:

An accurate clock shows 8 o'clock in the morning. Through how may degrees will the hour hand rotate when the clock shows 2 o'clock in the afternoon?

 A) 360 B) 180 C) 90 D) 60

Answer & Explanation Answer: B) 180

Explanation:

Angle traced by the hour hand in 6 hours=(360/12)*6

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30 30940
Q:

If the radius of a circle is decreased by 50%, find the percentage decrease in its area.

 A) 55% B) 65% C) 75% D) 85%

Answer & Explanation Answer: C) 75%

Explanation:

Let original radius = R.

New radius = $\frac{50}{100}R$$\frac{50}{100}R$

Original area =$\frac{R}{2}$  and new area = ${\mathrm{\pi R}}^{2}$

$\frac{3{\mathrm{\pi R}}^{2}}{4}*\frac{1}{{\mathrm{\pi R}}^{2}}*100$

Decrease in area = $\mathrm{\pi }{\left(\frac{\mathrm{R}}{2}\right)}^{2}=\frac{{\mathrm{\pi R}}^{2}}{4}$ = 75%

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79 30700
Q:

If log 2 = 0.3010 and log 3 = 0.4771, the values of log5 512 is

 A) 2.875 B) 3.875 C) 4.875 D) 5.875

Answer & Explanation Answer: B) 3.875

Explanation:

ANS:      log5512 = log512/log5  =  $\frac{\mathrm{log}{2}^{9}}{\mathrm{log}\left(10/2\right)}$  =$\frac{9\mathrm{log}2}{\mathrm{log}10-\mathrm{log}2}$ =$\frac{9*0.3010}{1-0.3010}$ =2.709/0.699 =2709/699 =3.876

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102 29531
Q:

The blue colour of the clear sky is due to

 A) Diffraction of light B) Dispersion of light C) Reflection of light D) Refraction of light

Answer & Explanation Answer: B) Dispersion of light

Explanation:

A clear cloudless day-time sky is blue because molecules in the air dissipate blue light from the sun more than they dissipate red light. When we look towards the sun at sunset, we see red and orange hues on the grounds because the blue light has been scattered out and away from the line of sight.

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Filed Under: General Science
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank PO

103 28292
Q:

Who is the guardian of fundamental Rights enumerated in Indian Constitution?

 A) Supreme Court B) Parliament C) Constitution D) President

Answer & Explanation Answer: A) Supreme Court

Explanation:

The Judiciary is the guardian of fundamental Rights enumerated in Indian Constitution.

In a criminal case, the judge has the power to decide whether the accused's rights have been violated.

As with most disputes, the courts decide when a right has been violated. They then have the power to act in order.

Here the Supreme Court is tyhe Highest of the Judiciary in India.

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Filed Under: Indian Politics
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

123 28216
Q:

If log 27 = 1.431, then the value of log 9 is

 A) 0.754 B) 0.854 C) 0.954 D) 0.654

Answer & Explanation Answer: C) 0.954

Explanation:

log 27 = 1.431
log$\left({3}^{3}\right)$ = 1.431
3 log 3 = 1.431
log 3 = 0.477
log 9 = log(${3}^{2}$)= 2 log 3 = (2 x 0.477) = 0.954

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42 27613