Bangladesh Bank (BB) Officer Written Question Solution

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Bangladesh Bank (BB) Officer Written Question Solution:

Organization Name: Bangladesh Bank

Post: Officer (General) 

Total Written passed candidates: 9897

Exam take:   Arts Faculty

See Bangladesh Bank (BB) Officer Written Question Solution below:

1. 490 M

2. 18

3. 10

4. 5

5.  622.37 cm3 (Approx)  

Full Written Math Solution:

1. A piece of stone fell from a balloon when it was flying in the upward direction with a velocity 20m/sec. what will be the height of the balloon when the stone hit the ground in 10seconds?

Solution:

Given that,
u=20 m/S
t=10 second
g=9.8 m/s
Distance S=?
We know that,
S=-ut + 1/2 gt^2
The velocity of the stone= negative value of the velocity of the balloon
(যেহেতু Direction বিপরীত)
Or, S=-20*10+0.5*9.8*(10)^2
Or,S=-200+490=290

Answer: 490 m

2. Find the maximum value of z=6x+2y suject to the condition x>=0, y>=0,: x+y=5;x<=2, y<=4

Solution:

For 6X+2y be maximum the value of X must be maximum from the given condition the maximum value of X can be 2 and then the value of y will be =3 as x+y=5
and then the maximum value of z will be = 6*2+2*3 =12+6 =18

if we put any value of x less than 2 than the value of z will be less than 18 as we can put x=1.9 and y= 3.1 or x=1.5,y = 3.5 as we get from putting those z= 17.6 or z= 16
so maximum value of z must be 18

Answer: 18

3. The sum of the digits of a two-digit number is subtracted from the number , how many such two digit numbers can be formed so that the digit in the unit place of the resulting number is 6.

Solution:

let the number be 10X+Y ,( Y is in unit place and X is in the tenth place )
so the sum of the digits will be X+Y
if the sum of the digits subtracted from the number than the result will be
10X+Y-(X+Y)= 9X

so the number resulting will be always the product of 9 so if its need to have 6 in unit place so the value of X must be 4 as e result it will be 9*4=36 here 6 in the unit place so all the two digit number which has 4 in tenth place will be the number so total such number will be 10 ( 40,41,42,43,44,45,46,47,48,49)

Answer: 10

4.

5. A semi circular sheet of metal of diameter 28 cm is bent into an open conical cup. Find the depth and capacity of cup.

Solution:

Given diameter = 28 cm
Radius, r = 14 cm
Circumference of semi circle = πr
= (22/7) x 14 = 44 cm
This becomes circumference of base of cone
2πR = 44
R = 44 x (7/44)
R = 7 cm
The radius of semi circular sheet = slant height of conical cup
That is l = 7 cm
We know that r² + h² = l²
14² + h² = 7²
196 – 49 = h²
h² = 147
Therefore, h = 7√3 cm
That is depth of the conical cup is 7Ö3 cm
Capacity of cup = (1/3) πr²h
= (1/3) x (22/7) x 7² x 7√3
= 622.37 cm3

Answer: 622.37 cm3 (Approx)  

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Bangladesh Bank (BB) Officer Written Question Solution:

Bangladesh Bank (BB) Officer Written Question Solution is available above. We publish different educational post on our website. Exam question solution is one of the most important concerns of our website. Bangladesh Bank (BB) Job Circular update at  https://erecruitment.bb.org.bd. Bangladesh Bank (BB) has published job circular on 01 categorizes post. Bangladesh Bank (BB)  is the central bank in Bangladesh. Bangladesh Bank (BB) has published a huge job circular  by the Authority. All information regarding the appointment of Bangladesh Bank (BB)  given on our website jobstestbd.com. We Publish all job circulars every day, Such as Government Jobs in Bangladesh, Bank Jobs in Bangladesh, Private Jobs in Bangladesh, International NGOs in Bangladesh, Private Companies in Bangladesh, Private University Jobs in Bangladesh. Bank Jobs Results, Government Jobs Results, Government University Jobs result in Bangladesh and all Part-time Jobs in Bangladesh and other educational support are available here in our website. We provide different types of job information with also provide some effective information or resource and job tips which helps to get job easily. We trust that our distributing data helps the activity searchers who are finding a superior employment. We likewise share slanting assets for learner uniquely who are expanding their insight. Our principle target turns into a trusty occupations round site in Bangladesh by distributing a genuine refresh that enables the joblessness to individuals. All the jobs of this website is not for the unemployed people but also employed people too. All type of suggestions, question solutions of different competitive exam are available here. We provide all type of educational support in our website jobstestbd.com. So everyday tune with our website for all kinds of educational support. Please like our Facebook page jobstestbd.com.

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