Aptitude - True Discount - Discussion
Discussion Forum : True Discount - General Questions (Q.No. 2)
2.
The true discount on Rs. 2562 due 4 months hence is Rs. 122. The rate percent is:
Answer: Option
Explanation:
P.W. = Rs. (2562 - 122) = Rs. 2440.
S.I. on Rs. 2440 for 4 months is Rs. 122.
| Rate = |
 |
100 x 122 |  % |
= 15%. |
|
Discussion:
47 comments Page 2 of 5.
Khin Myat Kyu said:
1 decade ago
2562 is sum of the money borrowed and true discount for 4 months.
So 2562 = The money borrowed+122.
The money borrowed = 2562-122 = 2440.
Then,
4 months (1/3 year) ===> 122.
12 months (1 year) ===> 366.
And,
Rs. 2440 ===> 366.
Rs. 100 ===> (100*366)/2440 = 15 %
So 2562 = The money borrowed+122.
The money borrowed = 2562-122 = 2440.
Then,
4 months (1/3 year) ===> 122.
12 months (1 year) ===> 366.
And,
Rs. 2440 ===> 366.
Rs. 100 ===> (100*366)/2440 = 15 %
(1)
Divyesh said:
10 years ago
S.I means?
Aachu..... said:
1 decade ago
Friends,
SI = interest on principal amount,
in the same way,
TD = interest on present worth,so v take PW instead of principal.
In question they gave TD with principal,so we first calculate the PW from principal & TD using the formula PW= principal-TD and then we calculate rate using the formula which is similar to the SI.
SI = interest on principal amount,
in the same way,
TD = interest on present worth,so v take PW instead of principal.
In question they gave TD with principal,so we first calculate the PW from principal & TD using the formula PW= principal-TD and then we calculate rate using the formula which is similar to the SI.
Ram said:
1 decade ago
@Deepa you are only used in correct formula.
Ammy said:
1 decade ago
Answer explanation:
PW= 100*amount/R*T.
Therefore from the above formula , we need to find R. Hence formula becomes,
R= 100*amount/P*T ------(1).
Here amount = Rs.122 is the discount amount for 4 years.
P = 2562-122 = 2418 is the original amount after applying discount.
T= 4 out of 12 months i.e = 4/12 = 1/3.
Substitute the values in (1), you will get the answer
PW= 100*amount/R*T.
Therefore from the above formula , we need to find R. Hence formula becomes,
R= 100*amount/P*T ------(1).
Here amount = Rs.122 is the discount amount for 4 years.
P = 2562-122 = 2418 is the original amount after applying discount.
T= 4 out of 12 months i.e = 4/12 = 1/3.
Substitute the values in (1), you will get the answer
Sravanthi said:
1 decade ago
Is present worth and principal amount same here?
But in the previous question he calculated pw is 100 and principal is 122?
But in the previous question he calculated pw is 100 and principal is 122?
Amit said:
1 decade ago
Can anyone share formula of calculating rate of interest?
Suhasini said:
1 decade ago
Hi,
I can't understand the true discount concept. Can anyone explain me clearly step by step?
I can't understand the true discount concept. Can anyone explain me clearly step by step?
Raman said:
10 years ago
2562 is money = B.D = 122.
2562-122 = 2440.
Then 4/12 = 1/3.
1/3 = 122 days.
1/12 = 366 days.
100*366/2440 = 15%.
2562-122 = 2440.
Then 4/12 = 1/3.
1/3 = 122 days.
1/12 = 366 days.
100*366/2440 = 15%.
Sakthivel said:
10 years ago
P.W = Amount - T.D.
So P.W = 2440.
T.D = (P.W)*R*T.
100 they ask rate percent.
So R = (100*T. D)/(P.W*T) %.
R = (100*122)/(2440*1/3).
= (100*122*3)/(2440*1).
Answer: 15%.
So P.W = 2440.
T.D = (P.W)*R*T.
100 they ask rate percent.
So R = (100*T. D)/(P.W*T) %.
R = (100*122)/(2440*1/3).
= (100*122*3)/(2440*1).
Answer: 15%.
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