SBI clerk prelims 22 Feb 2020 Questions and Answers Detailed Explanation

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The following question based on SBI clerk topic of previous year question answers

Questions : The ratio of the ages of Ram and Rahim 10 years ago was 1 : 3. The ratio of their ages five years hence will be 2 : 3. Then, the ratio of their present ages is :

(a) 1 : 2

(b) 3 : 5

(c) 3 : 4

(d) 2 : 5

e) None of these

The correct answers to the above question in:

Answer: (b)

Let 10 years ago, ages of Ram and Rahim were x years and 3x years, respectively.

Then, present age of Ram = (x + 10)

and present age of Rahim = (3x + 10)

According to the question,

$\text"x+10+5"/\text"3x+10+5" = 2/3$

⇒ 3x + 45 = 6x + 30

⇒ 3x = 15

∴ x = 5

Hence, required ratio = $\text"5+10"/\text"3×5+10"$

= $15/25$

= 3 : 5

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Read more sbi clerk 2020 prelims Based Previous Year Questions and Answers

Question : 1

Two trains of length 140m & 120m are running in same direction on parallel tracks with speeds 132 kmph & 80 kmph respectively. How much time will they take to cross each other?

a) 7.09 sec

b) 18 sec

c) 11.7 sec

d) 4.42 sec

e) Cannot be determined

Answer: (b)

Required time = $\text"140+120"/\text"(132−80)× 5/18"$

= $\text"260×18"/\text"52×5"$

= 18 sec

Question : 2

A person sold a book at 20% profit. If he had bought it at 10% less cost and sold for Rs 90 more then he would have gained 40% profit. Find cost price of book.

a) Rs 800

b) Rs 1600

c) Rs 1500

d) None of these

e) Rs 1200

Answer: (c)

let CP of book be Rs x

SP = Rs 1.2x

New CP = Rs 0.9x

New SP = Rs 1.2x + 90

ATQ, 0.9x × $140/100$ = 1.2x + 90

1.26x = 1.2x + 90

x = Rs 1500

Directions:

In each question two equations numbered (I) and (II) are given. You have to solve both the equations and mark appropriate answer.

[S.B.I. (CLERK) 2020]

Question : 3

I. x = $√{25}$ and II. y= 125

a) If x = y or no relation can be established

b) If x > y

c) If x < y

d) If x ≥ y

e) If x ≤ y

Answer: (a)

I. x = 5

II. y = 5

So, x=y

Question : 4

A car can cover a distance in 4 hour at speed 60 kmph then by what percent should the speed of car be increased to cover the same distance in 2.5 hr?

a) 60%

b) 40%

c) 50%

d) 100%

e) 75%

Answer: (a)

distance = 240 kms

Required speed = $240/2.5$ = 96 kmph

Required % = $\text"96−60"/60 × 100$ = 60%

Question : 5

12 men can do a work in 10 days while 10 women can do the same work in 18 days. In how many days 4 men & 6 women together can do the same work?

a) $120/7$ days

b) 24 days

c) $180/13$ days

d) 15 days

e) 18 days

Answer: (d)

let total work be 360 units

Efficiency of 1 man = $360/\text"12×10"$ = 3 units/day

Efficiency of 1 woman = $360/\text"10×18"$ = 2 units/day

Required time = $360/\text"4×3+6×2"$ = 15 days

Directions:

What will come in the place of question (?) mark in following number series:

[S.B.I. (CLERK) 2020]

Question : 6

72000, 36000, 12000, 3000, 600, ?

a) 120

b) 200

c) 30

d) 150

e) 100

Answer: (e)

sbi clerk prelims 2020 40a

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