CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Select Date
Tags:

Articles

Discussions
Submit Discussion
bikash

· started a discussion

· 1 Months ago

any other alternative?? (Question: 167669.0 )

method suggested in tis video will tk 60min to solve...aren't there any other method?

Question:
A sum of money at compound interest amounts in two years to Rs. 52920, and in three years to Rs. 55566. Find the original sum.
Options:
A) Rs. 48000
B) Rs. 42000
C) Rs. 40000
D) Rs. 45000
Solution:

Ans: (a) Difference in amounts = 55566-52920= \(\unicode{x20B9} \)2646

Now, we see that \(\unicode{x20B9} \)2646 is the interest on Rs 52920 in one year (it is either simple or compound interest because both are the same for a year)

Hence, rate of interest = \(\cfrac{2646×100}{52920}= 5\%\)

Now, for the original sum,

52920 = x \(\left ( 1+\cfrac{5}{100} \right )^2\)  

Or 52920 = x \(\left ( \cfrac{21}{20} \right )^2\)

\(∴ x = \cfrac{52920×20×20}{21×21}= \unicode{x20B9} 48000\)

For Video Solution Click on the link given below:

Knowledge Expert

· commented

· 1 Months ago

Dear Student,
See the explanation given, its so simple.
Keep Learning with Us
Best Wishes
Team Toprankers
-logo
We at aim to provide most comprehensive content & test for practice which is carefully divided into various chapters and topics to help you focus on your weak areas.Our Practice mock test gives you unmatched analytics to help you realize your strong areas,time management and improvement areas.Our Short & Crisp notes on each topic will help you to quickly revise the topic along with the tips & tricks of the exams.
More About
-Info
-Info

Mobile App

Get it on Google Play
About Us Campus Ambassador Careers Contact Us Refund Policy

All Rights Reserved Top Rankers

User Policy
Disclaimer
Terms & Conditions