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 16 of 18.
Kichu said:
1 decade ago
Thanks gayathri.
Jaya said:
1 decade ago
Gayathri thanks a lot its vry clr & simple
Venkatesh said:
1 decade ago
Gayathri thank you so much before that I want to say myself I am dull even though I understood you are explantion it is very clear keep it up.
Harsh said:
1 decade ago
I am not deciding which is easiest way to solve of the given question so please suggest me.
Uma said:
1 decade ago
@gayathri your explination is very helpfull.
Thank you.
Thank you.
Vikram said:
1 decade ago
According to the question,
SI + P = 815 in three years and
SI + P = 854 in four years
so 815 - P = SI and
854 - P = SI
Therefore,
815 - P = (P * 3 * R)/100 and ---- eq 1
854 - P = (P * 4 * R)/100 ---- eq 2
Now,
eq 1 / eq 2 gives
(815 - P)/(854 - P) = 3/4
Solving this eq, we get
P = 698
SI + P = 815 in three years and
SI + P = 854 in four years
so 815 - P = SI and
854 - P = SI
Therefore,
815 - P = (P * 3 * R)/100 and ---- eq 1
854 - P = (P * 4 * R)/100 ---- eq 2
Now,
eq 1 / eq 2 gives
(815 - P)/(854 - P) = 3/4
Solving this eq, we get
P = 698
(1)
Ashik said:
1 decade ago
S.I for one yr=854-815=39
for 4 years=4*39=156
hence,854-156=698
i think it will be simple....
for 4 years=4*39=156
hence,854-156=698
i think it will be simple....
Raghu karthic said:
1 decade ago
Superb explanation gayathri. Thanks a lot.
Prathap said:
1 decade ago
Simple and clear explanation by gayatri.
Reshmi said:
1 decade ago
Thank you gayathri. You explained well.
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