Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 1)
1.
A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is:
Answer: Option
Explanation:
S.I. for 1 year = Rs. (854 - 815) = Rs. 39.
S.I. for 3 years = Rs.(39 x 3) = Rs. 117.
Principal = Rs. (815 - 117) = Rs. 698.
Discussion:
171 comments Page 17 of 18.
Nithya said:
6 years ago
Thanks @Gayathri.
Tejanth said:
6 years ago
Nice explanation @Gayatri.
Arti said:
6 years ago
S.I For 3rd yr=815.
S.I For 4th yr=815.
Difference for 1yr = 39.
S.I for 3yrs = 39 * 3 = 117
P=815-117 = 698.
Similarly;
S.I for 4yrs = 39 * 4 = 156,
P = 854-156 = 698.
I hope it gets clear to you all.
S.I For 4th yr=815.
Difference for 1yr = 39.
S.I for 3yrs = 39 * 3 = 117
P=815-117 = 698.
Similarly;
S.I for 4yrs = 39 * 4 = 156,
P = 854-156 = 698.
I hope it gets clear to you all.
Madhav said:
6 years ago
@All.
Amount = Principe + interest.
4 year amount= principle + 4 year interest.
3 year amount = principle + 3 year interest.
Then
39= 1 year Interest
Now to calculate principle or sum
We have formulae that, amount - interest.
4 year amount- 4-year interest
854-4*39 =698.
or 3 year amount - 3-year interest.
815-3*39=698.
Amount = Principe + interest.
4 year amount= principle + 4 year interest.
3 year amount = principle + 3 year interest.
Then
39= 1 year Interest
Now to calculate principle or sum
We have formulae that, amount - interest.
4 year amount- 4-year interest
854-4*39 =698.
or 3 year amount - 3-year interest.
815-3*39=698.
Shubham Mude said:
6 years ago
We can also use the below formula:
(A1*T2 - A2*T1) / (T2-T1)
= (815*4 - 854*3) / (4-3)
= (3260 - 2562) / 1
= 698.
Hence, the answer.
(A1*T2 - A2*T1) / (T2-T1)
= (815*4 - 854*3) / (4-3)
= (3260 - 2562) / 1
= 698.
Hence, the answer.
NARENDRA AHIRWAR said:
6 years ago
Given:
First amount = Rs. 815.
Second amount=Rs. 854.
Diff of amount = second amount - first amount.
= 854-815.
= 39.
Now, for 3 years;
You will have to multiply.
=39*3.
=117.
So now principal is;
= 815-117,
p= 698.
First amount = Rs. 815.
Second amount=Rs. 854.
Diff of amount = second amount - first amount.
= 854-815.
= 39.
Now, for 3 years;
You will have to multiply.
=39*3.
=117.
So now principal is;
= 815-117,
p= 698.
Varshith said:
5 years ago
Thank you @Gayatri.
Varshith said:
5 years ago
I am not getting it, can anyone explain me clearly?
Basha said:
5 years ago
Thanks for your explanation.
Ramu said:
4 years ago
@Gayathri & @Ismail Khan
You both explained well. Thanks for eplaining.
You both explained well. Thanks for eplaining.
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