RAILWAYS GROUP D 2013 QP Detailed Solutions

1. RAILWAYS GROUP D
2013 QP Detailed Solutions
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Mr. S. P. Sajjan, M.Sc, KSET, NET,
Assistant Professor
Dept. of Computer Science
Govt. First Grade College for Women's, Jamkhandi.
Karnataka, India
Govt. First Grade College for Women's, Jamkhandi.

2. A 35 days B 30 days C 25 days D 20 days
1. In a hostel of 50 girls there are food provisions for 40 days. If 30
more girls join the hostel, the food provisions will last for:
Govt. First Grade College for Women's, Jamkhandi.
Explanation:
50 girls can eat for 40 days
40 ದಿನದಲ್ಲಿ 50 ವಿದ್ಯಾರ್ಥಿನಿಯರು ಉಟಮಯಡುತ್ಯಾರೆ ಎಂದ್ಯದರೆ
50 girls can eat for 40 days means 50 * 40 = 2000 days
50 ವಿದ್ಯಾರ್ಥಿನಿಯರು 40 ದಿನಯ ಉಟಮಯಡುತ್ಯಾರೆ ಎಂತ್ಯದರೆ 50*40=2000ದಿನಗಳು
If 30 more girls join, number of girls = 50 + 30 = 80
ಅದ್ೆ ರಿತಿ 30 ವಿದ್ಯಾರ್ಥಿನಿಯರು ಹೆೇಚ್ಚಿಗೆ ಕುಡಿಕೆ ಂಡರೆ=50+30=80
No. of days the food will last = 2000/80 = 25 days
ಹಯಗಯದರೆ ಎಷ್ುು ದಿನದಲ್ಲಿ ಉಟಯ ಮುಗಿವುತ್ಾದ್ೆ = 2000/80=25 ದಿನಗಳು
Hence, option C is the correct answer
ಆದದರಿಂದ option C ಸರಿಯಯದ ಉತ್ಾರ
Answer: C

3. A 8% B 10% C 12% D 15%
2. At what rate percent per annum compound interest, will Rs.
10,000 amount to Rs.13,310 in three years ?
Govt. First Grade College for Women's, Jamkhandi.
Explanation:
Let the required rate be x% p.a.
Here,A=Rs.13310,P=Rs.10000,t=3 years.
Using formula:
A=p(1+100R​)^n
⟹13310=10000(1+100x​)^3
13310=10000[100(100+x)​]^3
⟹1000013310​=[100(100+x)​]^3
⟹(1011​)^3=[100(100+x)​]^3
⟹1011​=100(100+x)​
⟹11×100=10×(100+x)
⟹1100=1000+10x
⟹1100−1000=10x
⟹10x=100
x=10
Answer: B
OR
1. ₹10,000 will become ₹13,310 in 3 years at 10% p.a.
compounded annually.
2. At 10% p.a. compounded annually :
3. In 1 year ₹11,000
4. In 2 years ₹12,100
5. In 3 years ₹13,320.

4. A 500 B 480 C 450 D 400
3. A man bought article and sold it at a gain of 10% . If he had bought
it at 20% less and sold it for Rs.10 more, he would have made an
profit of 40%. The cost price of the article is:
Govt. First Grade College for Women's, Jamkhandi.
Explanation:
1. You can find the cost price of the article easily by letting it 100% and also by understanding
that here Rs 10 is a difference between first and second selling price of the article because
second time he is selling the article for Rs 10 more
2. SP1: First time he is selling the article at 10% profit means at 110%
3. SP2: Second time he bought it at 20% less than before means at (100–20)= 80% and sold it
for 10 Rs more or at the profit of 40% =(80*140)/100 = 112%
4. SP2 - SP1 = 10 or (112–110) or 2% = 10
5. 100% or cost price of the article will be 1000/2 = 500 Rs
Answer: B

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