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 3 of 5.
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
Ram said:
1 decade ago
@Deepa you are only used in correct formula.
Dinesh kumar sharma said:
1 decade ago
Dear guys:
Don't think so much about the formula of personal wealth and discount. Moreover its conceptual question.
If someone returning money in 4 month he will get discount of INR 122 over the amount.
So instead of paying 2562 he is only paying = 2440 before 4 month otherwise he will pay 2562 after 4 month.
So 2562-2440 = 122 is interest which we getting at the end of 4 month.
So simple interest is = 122.
Formula for s.i = p*r*t/100.
So r = s.i*100/p*t(time should be in year so we use 1/3 year).
r = 122*100/2440*1/3 = 15%.
Don't think so much about the formula of personal wealth and discount. Moreover its conceptual question.
If someone returning money in 4 month he will get discount of INR 122 over the amount.
So instead of paying 2562 he is only paying = 2440 before 4 month otherwise he will pay 2562 after 4 month.
So 2562-2440 = 122 is interest which we getting at the end of 4 month.
So simple interest is = 122.
Formula for s.i = p*r*t/100.
So r = s.i*100/p*t(time should be in year so we use 1/3 year).
r = 122*100/2440*1/3 = 15%.
(2)
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.
Priyanka said:
1 decade ago
Rate percent is normally calculated for a year by doing 30.5/2440 we are not calculating for a year since 30.5 corresponds to a month only.
Thunderhemu said:
1 decade ago
How come 15% I can't understand since 122 is the interest for 4 months then for each month it is 30.5,
Then it should be 12.5%,
Since 10% 24.4 and 2.5 % is 6.1 so the should be 12.5%.
I guess can you explain it please.
Then it should be 12.5%,
Since 10% 24.4 and 2.5 % is 6.1 so the should be 12.5%.
I guess can you explain it please.
Suyeb said:
1 decade ago
What does true discount mean? is it means the amount of interest for a certain time of a certain amount of money?
Slovan said:
1 decade ago
What about this?
122= 4months => 1month = 30.5 => for a year 12*30.5= 366
2562-122= 2440
366/2440= 0.15 => 15%
122= 4months => 1month = 30.5 => for a year 12*30.5= 366
2562-122= 2440
366/2440= 0.15 => 15%
Goku said:
1 decade ago
Friends we can say T.D. = Interest on P.W. Hence the formula seems the same.
Mamta said:
1 decade ago
What is the difference between SI and TD ? please tell me.
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