Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 4)
4.
How much time will it take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest?
Answer: Option
Explanation:
years Discussion:
65 comments Page 3 of 7.
RAJKUMAR said:
10 years ago
S.I = 81, P = 450, R = 4.5.
T = S.I*100/P*R.
T = 81*100*10/450*45 (Cancel 100/450 with 5 and 81 AND 45 CANCEL WITH 9 AND 45 AND 10 CANCEL WITH 5).
T = 9*2*2/9.
T = 36/9.
T = 4 Years.
T = S.I*100/P*R.
T = 81*100*10/450*45 (Cancel 100/450 with 5 and 81 AND 45 CANCEL WITH 9 AND 45 AND 10 CANCEL WITH 5).
T = 9*2*2/9.
T = 36/9.
T = 4 Years.
Ramu said:
10 years ago
S.I = p*t*r/100.
100*S.I = p*t*r.
100*S.I/p*r = t.
Here p = 450, S.I = 81, r = 4.5 substitute above we get answer.
100*S.I = p*t*r.
100*S.I/p*r = t.
Here p = 450, S.I = 81, r = 4.5 substitute above we get answer.
Shruthi said:
9 years ago
Clarify me difference between I and p.
Mona said:
9 years ago
@Shruthi.
The I is an interest which had paid for using someone's money whereas p is the principal or sum which is the amount you borrowed from someone.
The I is an interest which had paid for using someone's money whereas p is the principal or sum which is the amount you borrowed from someone.
Srikruthi said:
9 years ago
p = 450,r = 4.5,i = 81,t = ?
I = P * R * T/100 now we have to find t=? so,
t = 100 * I/P * R.
t = 100 * 81/450 * 4.5.
= 100 * 81/45 * 10 * 4.5 (45 * 10 = 450).
= 100 * 81/45 * 45 (4.5*10 = 45).
= 36/9.
t =4.
I = P * R * T/100 now we have to find t=? so,
t = 100 * I/P * R.
t = 100 * 81/450 * 4.5.
= 100 * 81/45 * 10 * 4.5 (45 * 10 = 450).
= 100 * 81/45 * 45 (4.5*10 = 45).
= 36/9.
t =4.
Mohammed ashik said:
9 years ago
100% = 450. Rs.
1% = 4.5 Rs.
4% = 18.00 Rs.
0.5% = 2.25 Rs.
So 4.5% = 20.25 Rs.
Hence 20.25 * 4 = 81 Rs.
Ans: 4 years.
1% = 4.5 Rs.
4% = 18.00 Rs.
0.5% = 2.25 Rs.
So 4.5% = 20.25 Rs.
Hence 20.25 * 4 = 81 Rs.
Ans: 4 years.
Ganesh said:
9 years ago
They gave a number of Rs 450 so as per the formula amt = principal + interest, the amount should be subtracted from interest to get the principal but they directly takes principal as 450. Is it correct? Can anyone please clarify.
Dhamo said:
8 years ago
Formula: SI = P * T * R/100,
SI = simple interest(81),
P = principal(450),
T = time(?),
R = rate(4.5),
T = SI * 100/P * R.
T = 81 * 100/450 * 4.5,
T = 8100/2025.
T = 4. Here s the answer.
SI = simple interest(81),
P = principal(450),
T = time(?),
R = rate(4.5),
T = SI * 100/P * R.
T = 81 * 100/450 * 4.5,
T = 8100/2025.
T = 4. Here s the answer.
Vinod said:
8 years ago
Here 450is given as amount but it is taken as principle. Please Clear my confusion regarding this.
Ravula Sandeep Kumar said:
8 years ago
I should explain clearly in this.
Then time =100 * 81/450 * 4.5,
= 2 * 9/4.5,
= 18/4.5,
= 18 * 10/45,
= 18 * 2/9,
= 2 * 2,
= 4 years.
Then time =100 * 81/450 * 4.5,
= 2 * 9/4.5,
= 18/4.5,
= 18 * 10/45,
= 18 * 2/9,
= 2 * 2,
= 4 years.
(3)
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