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:
174 comments Page 15 of 18.
Satish said:
1 decade ago
@Gayahthri explained good .
Ismail khan said:
1 decade ago
Amount for three years is 815
so AMOUNT= p + SI
A = p + pin
815= p + 3pi.......... (1)
similerly for 4 years
854 = p +4pi..........(2)
subtracting equation (1) from(2) we get
39 = pi
or
pi =39
put this value of pi in equation (1) we get
815= p+ 3*39
815= p+ 117
815-117=p
p=698
so AMOUNT= p + SI
A = p + pin
815= p + 3pi.......... (1)
similerly for 4 years
854 = p +4pi..........(2)
subtracting equation (1) from(2) we get
39 = pi
or
pi =39
put this value of pi in equation (1) we get
815= p+ 3*39
815= p+ 117
815-117=p
p=698
Moksh said:
1 decade ago
@Gayathri.
Thanks a lot dear.
Very useful answer :).
Thanks a lot dear.
Very useful answer :).
Radhika said:
1 decade ago
Thank you so much Gayathri.... very good explaination
Tejashree said:
1 decade ago
Thanks gayathri
Saurabh said:
1 decade ago
Thanks gayathri.
Venkatesh kumar said:
1 decade ago
Thanks Gayathti for giving detailed explanation.
Sonia said:
1 decade ago
Thanks Gayathri. Really your explanation is helpful.
Ranjitha said:
1 decade ago
Its same friends.. you can do it in either way
(39*4)=156
854-159=698 only
(39*4)=156
854-159=698 only
Muskan said:
1 decade ago
Please give me the solution of this question.
A certain sum given on simple interest became double in 20 years. In how many years will it be 4 times.
A certain sum given on simple interest became double in 20 years. In how many years will it be 4 times.
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