Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 7 Answered

A sum amounts to Rs 1326 in 6 years at 5% p.a. simple interest. In what time will this sum double itself at the same rate of interest?

Asked by bubu64272 | 30 Dec, 2018, 10:50: PM
Expert Answer
Let the sum be Rs. x.
A = Rs. 1326, n = 6 years, r = 5% p.a. 
 
A = P + SI
1326 = x + x × 6 × 5/100
x + 0.3x = 1326
1.3x = 1326
x = 1020
Hence, the sum invested is Rs. 1020.
According to the question,
P = Rs. 1020 and A = Rs. 2 × 1020 = Rs. 2040
A = P + SI
2040 = 1020 + 1020 × n × 5/100
We get n = 20 years
 
In 20 years time the sum will be double at the same rate of interest.
Answered by Sneha shidid | 31 Dec, 2018, 09:57: AM

Concept Videos

ICSE 7 - Maths
Asked by anikbaviskar79.7spicertl | 28 Oct, 2020, 07:56: PM
ANSWERED BY EXPERT
ICSE 7 - Maths
Asked by aayushsinghrajput1506.7sdatl | 06 May, 2020, 05:59: PM
ANSWERED BY EXPERT
ICSE 7 - Maths
Asked by narani.saritha1 | 21 Nov, 2019, 06:39: PM
ANSWERED BY EXPERT
ICSE 7 - Maths
Asked by anirbanhalder87 | 16 Oct, 2019, 08:37: AM
ANSWERED BY EXPERT
ICSE 7 - Maths
Asked by yashwanthyash535 | 17 Dec, 2018, 08:18: PM
ANSWERED BY EXPERT
Season Break Offer!
Get 60% Flat off instantly.
Avail Now
×