SBI clerk prelims 2019 - Category wise Question and Answer Practice Test with Solutions & PDF
Directions:
What value will come in place of the question mark (?) in the following question?
Question : 42 [sbi-clerk-2019]
On giving a discount of 25% on the MRP of an article, the trader earns a profit of 20%. If the difference between the MRP & CP of the article is 180 Rs. What is the MRP of the article? (in Rs)
a) 400
b) 480
c) 540
d) 420
e) 510
Answer »Answer: (b)
Direct ratio between MP & CP
= (100+P%) : (100- D%)
= 120 : 75 = 8 : 5
So, MP= 8x & CP= 5x
ATQ, 8x-5x= 180
x = $180/3$ = 60
MP= 8× 60= 480 Rs.
Question : 43 [sbi-clerk-2019]
The diameter of a circular field is equal to the side of a square field. If the total cost of fencing the circular field is Rs 440 (@ of Rs 5 per meter), what is the perimeter of the square fields? (in metre)
a) 104
b) 116
c) 128
d) 88
e) 112
Answer »Answer: (e)
Circumference of Circle= 2× $22/7$ ×r = $440/5$
2r= 28 meter
So Perimeter of square = 28×4= 112 meter
Question : 44 [sbi-clerk-2019]
A boat takes 5 hrs to travel 105 km downstream. The speed of the boat in downstream is 1.4 times of the speed of the boat in upstream. What is the speed of the current? (in km/ph)
a) 3
b) 4
c) 3.5
d) 2.5
e) 5
Answer »Answer: (a)
Speed of downstream= $105/5$ = 21 km/hr
The ratio between downstream & upstream speed
= 1.4 : 1
= 7 : 5
So 7 @ 21
5 @ $21/7$ ×5 = 15 km/hr
So speed of stream= = 3 km/hr
Question : 45 [sbi-clerk-2019]
The ratio of milk to water in X litres of mixture is 4:1. Half of the mixture is taken out & 24 litres of water is added to remaining mixture such that quantity of milk & water in Resultant mixture become same. What is the value of X?
a) 60 litres
b) 80 litres
c) 100 litres
d) 40 litres
e) None of these
Answer »Answer: (b)
$(X/2 x 4/5) / (X/2 x 1/2 + 24)$ = 1
$\text"2X"/5 = X/10 + 24$
⇒ $\text"3X"/10 = 24$
$X = (24 x 10)/3 = 80$
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