Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 13)
13.
A certain amount earns simple interest of Rs. 1750 after 7 years. Had the interest been 2% more, how much more interest would it have earned?
Answer: Option
Explanation:
We need to know the S.I., principal and time to find the rate.
Since the principal is not given, so data is inadequate.
Discussion:
97 comments Page 3 of 10.
Pappu das said:
8 years ago
Correct answer - c - 350, how.
In 7 yr SI - RS. 1750
In 1 yr SI - RS . 250, so interest increase by R - 10%.
Get principal through formula - P*R*T/100,
1750 = P * 10 * 7 /100.
P = 2500.
So, increase rate of interest by 2% , ( 10%+2%) = 12 %.
SI at 12 % interest rate on 7 years on same principal = 2100,
Finally - SI at 12% - SI at 10 %.
2100 - 1750 = 350 answer.
In 7 yr SI - RS. 1750
In 1 yr SI - RS . 250, so interest increase by R - 10%.
Get principal through formula - P*R*T/100,
1750 = P * 10 * 7 /100.
P = 2500.
So, increase rate of interest by 2% , ( 10%+2%) = 12 %.
SI at 12 % interest rate on 7 years on same principal = 2100,
Finally - SI at 12% - SI at 10 %.
2100 - 1750 = 350 answer.
Aakash said:
7 years ago
The answer should be 35.
Given:
p*r*7/100 = 1750.
According to question;
new rate = r+2%of r.
new rate = r+0.02*r.
new rate = 1.02*r.
Hence new SI = p*1.02*r*7/100,
new Si = 1.02*p*r*7/100,
new Si = 1.02*1750,
= 1785.
Difference = 1785-1750 = 35.
Given:
p*r*7/100 = 1750.
According to question;
new rate = r+2%of r.
new rate = r+0.02*r.
new rate = 1.02*r.
Hence new SI = p*1.02*r*7/100,
new Si = 1.02*p*r*7/100,
new Si = 1.02*1750,
= 1785.
Difference = 1785-1750 = 35.
Sooraj said:
7 years ago
SI=P * R/100 * T,
1750=P * R/100 * T,
When R increase by 2%.
R become 1.02R,
new SI = P * 1.02R/100 * 7,
= P * R/100 * 7 * 1.02,
= 1750 * 1.02,
= 1785.
Increase in SI = 1785-1750 = 35.
1750=P * R/100 * T,
When R increase by 2%.
R become 1.02R,
new SI = P * 1.02R/100 * 7,
= P * R/100 * 7 * 1.02,
= 1750 * 1.02,
= 1785.
Increase in SI = 1785-1750 = 35.
Ashwini said:
7 years ago
The Answer must be 350.
Koko said:
7 years ago
Here, the 2% more interest means in absolute S.I terms, as in if it was 6% interest then how much more would you earn if you had 8% interest, not 6% x 1.02 which is 6.12%. Since we cannot calculate the S.I itself, we will never be able to find the answer. Please anyone help me to get it.
Reetu said:
8 years ago
According to me, the answer is Rs 175.14.
Amu said:
8 years ago
Actually, we have to find just amount of how much earned not a rate of interest so 35 answer is correct.
Tarun singh said:
8 years ago
1750 = pr7/100.
Value of pr/100 = 250 from above.
Now r is 2% more.
S.I = p(1.02r)7/100.
S.I = 7.14pr/100.
Substitute the value of pr/100 in above,
S.I = 7.14*250 = 1785.
So difference = 1785-1750 = 35.
Value of pr/100 = 250 from above.
Now r is 2% more.
S.I = p(1.02r)7/100.
S.I = 7.14pr/100.
Substitute the value of pr/100 in above,
S.I = 7.14*250 = 1785.
So difference = 1785-1750 = 35.
Tarun singh said:
8 years ago
35 is correct ans
Megha said:
8 years ago
Why don't we assume 100 as a principal?
Can anyone answer this?
Can anyone answer this?
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