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Aptitude - Simple Interest - Discussion

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"Nothing is impossible to a willing heart."
- (Proverb)
5. 

Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest?

[A]. 3.6[B]. 6
[C]. 18[D]. Cannot be determined
[E]. None of these

Answer: Option A

Explanation:

Let rate = R% and time = R years.

Then, 1200 x R x R = 432
100

12R2 = 432

R2 = 36

R = 6.


Bhavya Y J said: (Fri, Jun 11, 2010 09:59:14 AM)    
 
While traveling at uniform speed. U read a two digit no. after one hr the number is reversed order. After another hour the number read is same two digit number. What is the average speed?

Ppp said: (Thu, Feb 17, 2011 07:21:18 AM)    
 
Why should we take R for time why should not T or Something other?

Sakshi said: (Sun, Mar 6, 2011 09:44:43 PM)    
 
You are right Ppp.
We can also take x.
according to the question R=T.we can take R=T=x
R= S.I*100/P*T
x=432*100/1200*x
x to the power square =36; x= 6

Vaani said: (Sat, May 7, 2011 08:15:33 AM)    
 
As many years as the rate of interest so we taken t=r

Sanju said: (Fri, May 20, 2011 02:33:57 PM)    
 
According to ques we can also take x, y, z it is not a matter.

Hasmukh Maniya said: (Mon, Jun 13, 2011 08:06:06 AM)    
 
But Why we took R two times in this Solution..

We can Take Like R=Rate of Interest and T=Time

the Formula is SI=PRT/100

In this Formula if We take 1 year then the ans will be 36 instead of 6.

Plz Give me Proper Solution for my biggest Confusion..As Soon As

Kishan said: (Sat, Sep 17, 2011 06:46:46 PM)    
 
Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest.

Please solve the above sentence.

Anil said: (Tue, Oct 4, 2011 07:33:11 PM)    
 
Actually, I am unable to understand what the question is, can anyone please explain me.

Lavs said: (Thu, Nov 3, 2011 07:51:58 PM)    
 
Hai friends
Actually reena took sum of Rs.1200 ie P=1200 and paid simple interest of Rs.432
We are asked to find the rate ie R
It is given that, simple interest for as many years as the rate of interest. this line mean that T=R.
Or
you can asuume R & T to some other variable also ie R=T=x

formulato be used is SI=PRT/100
432=1200*R*R/100 (Here i have used T=R)
43200=1200 R square
Rsquare=43200/1200
Rsquare=36
R=6
Hope understand... Goood night

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