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:
98 comments Page 3 of 10.
Kishan Patel said:
7 years ago
I agree with you @Sooraj.
Sooraj said:
8 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:
8 years ago
The Answer must be 350.
Jay said:
7 years ago
35 is the correct answer according to me.
Roneet said:
6 years ago
Assuming the rate of interest to be 10% in 1st case we get;
P=(1750*100)/(10*7),
P=2500.
So applying the principal in 2nd case we get,
S.I=(2500*10.2*7)/100.
Here, the rate of interest is taken to be 10.2 since 2% more of 10 that is assumed in 1st case.
S.I=1785.
So 2nd S.I - 1st S.I will be;
1785-1750=35 This should be the answer but as the rate is not mentioned and it is assumed so the answer may vary from person to person and also method to method of solving.
P=(1750*100)/(10*7),
P=2500.
So applying the principal in 2nd case we get,
S.I=(2500*10.2*7)/100.
Here, the rate of interest is taken to be 10.2 since 2% more of 10 that is assumed in 1st case.
S.I=1785.
So 2nd S.I - 1st S.I will be;
1785-1750=35 This should be the answer but as the rate is not mentioned and it is assumed so the answer may vary from person to person and also method to method of solving.
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.
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
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers