SBI clerk prelims 22 Feb 2020 Questions and Answers Detailed Explanation
MOST IMPORTANT previous year question answers - 2 EXERCISES
The following question based on SBI clerk topic of previous year question answers
(a) Rs 7000
(b) Rs 9500
(c) Rs 7500
(d) Rs 6000
e)
Rs 6500
The correct answers to the above question in:
Answer: (d)
Let amount invested by A be Rs x
Profit ratio; A : B
= (x × 12) : (17000 – x) × 6 + (15500 – x) × 6
= 2x : (32500 – 2x)
ATQ, $\text"19500"/\text"32500−2x+2x" × (32500 − 2x)$ = 8100
32500 – 2x = 13500
x = Rs 9500
Required capital of B after 6 months
= 15500 – x = Rs 6000
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Question : 1
If the length of a rectangle increase by 40% while keeping breadth constant then the area of rectangle increased by 24 m2 and perimeter of the original rectangle is 32 m. find breadth of the rectangle.
a) 8.4 m
b) 10 m
c) 6 m
d) 14 m
e) 8 m
Answer »Answer : (c)
let length & breadth of rectangle be x & y m respectively
ATQ, 1.4xy – xy = 24
xy = 60………(i)
also, 2(x + y) = 32
x + y = 16….(ii)
from (i) & (ii)
x = 10 m, y = 6 m
Breadth of rectangle = 6 m
Directions:
What will come in the place of (?) mark in following question.
Question : 2
280 ÷ 4 ÷ 2 = 170 - ?
a) 105
b) 115
c) 125
d) 135
e) 145
Answer »Answer: (d)
? = 170 – 35
? = 135
Question : 3
$(√{144}+√{169}) x 3 = ?/5$
a) 375
b) 325
c) 350
d) 275
e) 475
Answer »Answer: (a)
$(12 + 13) × 3 = ?/5$
? = 375
Question : 4
A boat can cover 28 km downstream in 42 min. ratio of speed of boat in still water to speed of stream is 7 : 3. Find difference between time taken by boat to cover 60 km downstream & 40 km upstream.
a) 2.25 hr
b) 1 hr
c) 1.5 h
d) 0.4 hr
e) 0.9 hr
Answer »Answer: (b)
Let speed of the boat in still water & speed of the stream be 7x & 3x kmph respectively
ATQ, $28/\text"7x+3x" = 42/60$
x = 4
Required difference = $40/\text"7x−3x" − 60/\text"7x+3x"$
= $4/x$ = 1 hour
Question : 5
Rs 6000 when invested at a certain rate at SI for 2 years, it fetches Rs 1200. If the same sum is invested at the same rate for a year compounded half-yearly then find compound interest.
a) Rs 615
b) Rs 600
c) Rs 1200
d) Rs 585
e) Rs 1260
Answer »Answer: (a)
Let rate of interest be R%
ATQ, 1200 = $\text"6000×R×2"/100$
R = 10%
Since compounding is done half-yearly, rate of interest = 5%
Effective rate of interest = 5 + 5 + $\text"5×5"/100$ = 10.25%
Required interest = $\text"6000×10.25×1"/100$ = Rs 615
Question : 6
A container contains mixture of milk & water in ratio 5 : 3 respectively. If 8 lit milk is added in it then ratio of milk to water becomes 11 : 5. Find difference between initial quantity of milk & that of water.
a) 5 lit
b) 38 lit
c) 18 lit
d) 30 lit
e) 10 lit
Answer »Answer: (e)
Let initial quantity of milk & water be 5x & 3x lit respectively
ATQ, $\text"5x+8"/\text"3x" = 11/5$
25x + 40 = 33x
⇒ x = 5
Required difference = 5x – 3x = 2x
= 10 lit
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