Rupali Bank Senior Officer Written Exam Question Solution 2019

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Rupali Bank Written Exam Question 2019:
Exam Date: 

Rupali Bank Written Exam Question Solution 2019 - See Below....

Rupali Bank Senior Officer Written Exam Question Solution 2019

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Rupali Bank Written Exam Question Solution 2019

Rupali Senior Officer Written Math Solution 2019

এর সবগুলো ম্যাথ সমাধানের চেষ্টা করলাম।ভুল হলে জানাবেন।

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1. On a river , Q is the mid - point between two points P and R on the same bank of the river. A boat can go from P to Q and back in 12 hours, and from P to R in 16 hours 40 minutes. How long would it take to go from R to P?

P to R=16 h 40 min

1/2(P to R)=P to Q=8h 20 min

So, P to Q + Q to P = 12h

P to Q=8h 20 min

Then Q to P=3h 40m

2(Q to P) =R to P=(3h 40min)*2=7h 20min (Ans.)

ans - 7(1/3) or 7.33 or 7 h 20m

2. If x + 2/x= 1, then evaluate the value of (x^2+x+2)/x^2(1-x).

Given that

X+2/x=1

Or,(x^2+2)/x=1

Or, x^2+2=x

Again, x^2-x=-2

NOW,

X^2+x+2/x^2(1-x)

=(x+x)/x^2-x^3

=2x/-x(x^2-x)

=2x/-x*-2

=1

Ans: 1

3. A & B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone?

Let, efficiency of A and B is =x and y respectively

ATQ,

30(x+y)=16x+44y

X=y

So, x:y=1:1

Now, efficiency 1+1=2 equal to 30 days

Efficiency 1 equal to 30*2=60

ans 60 days

4. A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m long coming from opposite direction in 6 seconds.The speed of the second train is

ATQ,

(108+112)/(50+x)*5/18=6

X=82 kmnph

ans 82kmph

5. In a three digit number unit digit is double of tenth digit and 1.5 times of hundred digit. Sum of three digit is 13. Find the number

Ratio of

Unit digit : tenth digit =2:1=6:3

Unit digit : 100th digit =1.5:1=6:4

So, ratio of unit: tenth:100th digit =6:3:4

Their sum is 6+3+4=13

So the number is = 436

ans 436

6. A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are drawn at random, what is the probability that at least one is green?

= (⁶C₁ * ⁹C₁)/¹⁵C₂ + ⁶C₂/¹⁵C₂

= (6 * 9 * 2)/(15 * 14) + (6 * 5)/(15 * 14) = 36/70 + 1/7

= 46/70 = 23/35

ans 23/35

7. A mixture contain two liquid in the ratio of 2:3. And another mixture contain the same two liquid in the ratio of 5:4. Find the ratio in which the contents of both the vessels must be mixed to get a new mixture containing two liquid in the ratio equally?

Let, x litres is to be drawn from first.

And y litres From second.

ATQ,

2x/5+5y/9=3x/5+4y/9

X:y=5:9

ans 5:9

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Rupali Bank Written Exam Question Solution 2019: 

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