Question

Choose correct alternative
An amount doubles it self at simple interest in 5 years .in how many years will it be 8 times of the initial amount ?

• A. 15 years
• B. 40 years
• C. 30 years
• D. None

Answer 1

The correct option is D None

Answer
A = 2p
S .T = A - P
= 2p - p = p
S.J $=\frac{pxR\times T}{100}$
$P=\frac{p\times R\times T}{100}$
Let time it type S .I - 8p - p = 7p
$7P=\frac{p\times 20\times T}{100}$
$T=7\times 5=35$