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Caselet
Direction (1 – 5): Read the following information carefully and answer the given questions?
Rahul invested Rs.5000 on compound interest at 10% per annum for 2 years in scheme A. Rahul invested Rs.7000 more than the sum invested by him in Scheme A in Scheme B which offers simple interest at 15% per annum for 5 years. Total interest earned by Rahul is (S). Five years ago Rahul is 2 times as old as his son Ram. After 15 years, he will be 20 years older than his son and the sum of the present age of Rahul and Ram is (T) years. Rahul and Ram can started the business with the investment of Rs.4800 and Rs.6000 respectively and after 6 months Rahul added Rs.1200 for his initial investment. At the end of one year the total profit is Rs.3800, then the profit share of Ram is Rs.(U). Ram bought one laptop and if profit on selling the laptop for Rs.(U) is twice the loss on selling it for Rs.350. The cost price of Ram’s laptop is Rs.(V). Ram invests Rs.(U) at 10% per annum for one year. If the interest is compounded half yearly, then he received the amount by Rs.(W) at the end of the year.
1) Find the in the place of (S)?
a) Rs.9080
b) Rs.11070
c) Rs.10050
d) Rs.12060
e) Rs.8070
2) Find the in the place of (T)?
a) 60 years
b) 70 years
c) 65 years
d) 75 years
e) 80 years
3) Find the in the place of (U)?
a) Rs.1200
b) Rs.1600
c) Rs.1800
d) Rs.2000
e) Rs.1400
4) Find the in the place of (V)?
a) Rs.900
b) Rs.1000
c) Rs.1200
d) Rs.800
e) None of these
5) Find the in the place of (W)?
a) Rs.2105
b) Rs.1805
c) Rs.1825
d) Rs.2205
e) None of these
Application Sums
6) Car A starts from Mumbai to Delhi at 8 am and car B starts from Delhi to Mumbai at 8 am. If the ratio of the speed of car A to speed of car B is 2: 1 and the distance between Mumbai to Delhi is 480 km. After meets each other car A takes 240 minutes to reach Delhi and car B takes 16 hours to reach Mumbai. In which time they meet each other?
a) 2 pm
b) 4 pm
c) 6 pm
d) 8 pm
e) None of these
7) A, B, C and D together can complete the work in 10 days. If ratio of the efficiency of A to B is 5: 4, ratio of the efficiency of A to C is 5: 3 and the efficiency of C is x% of A, find the value of x?Â
a) 80
b) 40
c) 120
d) 60
e) None of these
8) Rahul invests his amount on scheme A and B in the ratio of 2: 3 and both the schemes are offers simple interest. Scheme A and scheme B offers interest rate is 12% per annum and 15% per annum respectively. After 2 years Rahul earned the total interest is Rs.5520. If Rahul invests the total amount in scheme C which offers compound interest at 10% per annum for 2 years, what is the compound interest earned by Rahul?
a) Rs.3600
b) Rs.4000
c) Rs.4200
d) Rs.4500
e) None of these
9) A shopkeeper has two items Pen and Pencil and cost price of the pen is 50% more than that of cost price of pencil. Marked price of pen is 20% above the cost price and the marked price of Pencil is 50% above the cost price. Sam bought both pen and pencil at the marked price. Sam sold pen to Rinu at Rs.4950 at 10% profit.
From the statement given in the above question which of the following can be determined.
a) Cost price of Pen
b) Marked price of Pencil
c) What is the initial mark up amount on Pen
d) Difference between the cost price of Pencil and marked price of pen
a) Only A
b) Only A and C
c) Only A, B and C
d) All A, B, C and D
e) Only A, D and B
10) Ratio of the number of male to female employees in a company is 3: 2 and the average age of male and female is 60 years and 56 years respectively. The oldest male and female age is 70.4 years and 58.4 years respectively. If oldest male and female resign their job, the average age of the company is decreases by 4 years. Find the number of male employees in the company?
a) 3
b) 6
c) 15
d) 12
e) None of these
Answers :
Direction – 1 – 5
CI = P * (1 + R/100)n – P
CI = 5000 * (1 + 10/100)2 – 5000
= 1050
SI = 12000 * 15 * 5/100 = 9000
Total interest amount(S) = 9000 + 1050 = Rs.10050
Rahul – 5 = 2(Ram – 5)
Rahul – 2Ram + 5 = 0 —– (1)
Rahul – Ram = 20 —— (2)
(1) – (2)
-Ram = -25
Ram = 25
Rahul = 45
Sum (T) = 45 + 25 = 70
Profit ratio of Rahul and Ram = (4800 * 6 + 6000 * 6): 6000 * 12
= 648: 720
= 9: 10
Ram profit share (U) = 10/19 * 3800 = Rs.2000
CP of laptop = V
2000 – V = 2(V – 350)
2000 – V = 2V – 700
3V = Rs.2700
= > V = Rs.900
Amount (W) = 2000 * (1 + 5/100) * (1 + 5/100)
= 2000 * 21/20 * 21/20
= Rs.2205
1) Answer: C
CI = P * (1 + R/100)n – P
CI = 5000 * (1 + 10/100)2 – 5000
= 1050
SI = 12000 * 15 * 5/100 = 9000
Total interest amount(S) = 9000 + 1050 = Rs.10050
2) Answer: B
Rahul – 5 = 2(Ram – 5)
Rahul – 2Ram + 5 = 0 —–(1)
Rahul – Ram = 20 ——(2)
(1) – (2)
-Ram = -25
Ram = 25
Rahul = 45
Sum(T) = 45 + 25 = 70
3) Answer: D
Profit ratio of Rahul and Ram
= (4800 * 6 + 6000 * 6): 6000 * 12
= 648: 720
= 9: 10
Ram profit share (U) = 10/19 * 3800 = Rs.2000
4) Answer: A
CP of laptop = V
2000 – V = 2(V – 350)
2000 – V = 2V – 700
3V = Rs.2700
= > V = Rs.900
5) Answer: D
Amount (W) = 2000 * (1 + 5/100) * (1 + 5/100)
= 2000 * 21/20 * 21/20
= Rs.2205
Directions (6-10) :
6) Answer: B
Speed of car A = 2x
Speed of car B = x
Time take to meet = 480/(2x + x) = 160/x
After meet car A reached Delhi takes 240 minutes,
480/2x = (160/x) + (240/60)
240/x – 160/x = 4
80/x = 4
x = 20
Time taken by meet = 160/20 = 8 hours
Time = 8 am + 8 = 4 pm
7) Answer: D
A + B + C + D = 1/10
A: B = 5: 4
A: C = 5: 3
Efficiency ratio of A, B and C = 5: 4: 3
Required percentage = 3/5 * 100 = 60%
8) Answer: C
Simple interest = P * N * R/100
2x * 2 * 12/100 + 3x * 15 * 2/100 = 5520
138x = 552000
x = 4000
Rahul total investment = 5 * 4000 = 20000
Compound interest = P * (1 + R/100)n – P
CI = 20000 * (1 + 10/100)2 – 20000
= 4200
9) Answer: D
Cost price of pencil = x
Cost price of pen = x * 150/100 = 3x/2
Marked price of Pen = 120/100 * 3x/2 = 9x/5
Marked price of pencil = 150/100 * x = 3x/2
9x/5 * 110/100 = 4950
990x = 4950 * 500
x = 2500
Cost price of pen = 3 * 2500/2 = 3750
Marked price of Pencil = 3/2 * 2500 = 3750
Mark up amount on pen = 9x/5 – 3x/2
=750
Marked price of Pen = 9/5 * 2500 = 4500
Required difference = 4500 – 2500 = 2000
10) Answer: A
Total number of employees = x
Average age of the company = (60 * 3 + 56 * 2)/5 = 58.4 years
After decrease = 58.4 – 4 = 54.4 years
(58.4x – 70.4 – 58.4)/(x – 2) = 54.4
58.4x – 128.8 = 54.4x – 108.8
4x = 20
x = 5
Number of male employees = 3/5 * 5 = 3
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