Topics

General Knowledge
General Science
General English
Aptitude
General Computer Science
General Intellingence and Reasoning
Current Affairs
Exams
Elementary Mathematics
English Literature

A sum, at the compound rate of interest, becomes 2 1/2 times in 6 yr. The same sum becomes what times in 18 yr?

A) 5/2
B) 25/4
C) 125/8
D) 625/16

Correct Answer:



C) 125/8

Description for Correct answer:
If sum is x, then x becomes \( \Large \frac{5}{2}x \) in 6 yr.

\( \Large \frac{5}{2}x \) becomes \( \Large \frac{25}{4}x \) in 12 yr.

\( \Large \frac{25}{4}x \) becomes \( \Large \frac{125}{8}x \) in 18 yr.

The sum becomes \( \Large \frac{125}{8}x \) times 1n 18 yr.

Part of solved Compound interest questions and answers : >> Aptitude >> Compound interest

Comments

Similar Questions

1). What is the difference between compound interest and simple interest for 2 yr on the sum of RS. 1250 at 4% pa?

A). RS.3

B). RS.4

C). RS.2

D). RS.8

2). The difference between compound and simple rates of interest on RS. 10000 for 3 yr at 5% per annum is

A). RS.76.25

B). RS.76.75

C). RS.76.50

D). RS.76

3). What is the difference between the compound interest and simple interest calculated on an amount of RS.16200 at the end of 3 yr at 25% pa? (Rounded off to two digits after decimal)

A). RS.3213.44

B). RS.3302.42

C). RS.3495.28

D). RS.3290.63

4). If the difference between the compound interest and the simple interest on a certain sum for 2 yr at 8% per annum is RS. 32, then the sum is

A). RS.5000

B). RS.5500

C). RS.6000

D). RS.5250

5). The simple interest for certain sum in 2 yr at 4% pa is RS. 80. What will be the compound interest for the same sum, if conditions of rate and time period are same?

A). RS.91.60

B). RS.81.60

C). RS.71.60

D). RS.80

6). The compound interest is RS. 6.40 more than the simple interest, if a sum is lent for 2 yr at 8% compound interest. Find the sum.

A). RS.1800

B). RS.10000

C). RS.800

D). RS.1000

7). A certain sum at compound interest amounts to RS. 12960 in 2 yr and RS. 13176 in 3 yr. Find the rate per cent per annum.

A). \( \Large 1\frac{1}{3}% \)

B). \( \Large 2\frac{1}{3}% \)

C). \( \Large 1\frac{2}{3}% \)

D). \( \Large 2\frac{2}{3}% \)

8). A sum amounts to RS. 2916 in 2 yr and RS. 3149.28 in 3 yr at compound interest. The sum is

A). RS.1500

B). RS.2500

C). RS.2000

D). RS.3000

9). At what per cent annual compound interest rate, a certain sum amounts to its 27 times in 3 yr?

A). 100%

B). 150%

C). 75%

D). 200%

10). What will be the principal, if the rate of 5% per annum can yield RS. 410 as compound interest in 2 yr?

A). RS.4000

B). RS.42000

C). RS.8000

D). RS.21000