Question
Write ‘T’ for true and ‘F’ for false for the following:
A sum doubles itself at simple interest at 10% per annum in 10 years.
A sum doubles itself at simple interest at 10% per annum in 10 years.
✓
Answer
True.Solution:
Let the sum be Rs. x
$\text{S.I.}=\frac{\text{P}\times\text{R}\times\text{T}}{100}$
$\text{S.I.}=\frac{\text{x}\times10\times10}{100}$
$\text{S.I.}=\text{Rs. x}$
Amount = S.I. + P
= x + x
= Rs. 2x
Let the sum be Rs. x
$\text{S.I.}=\frac{\text{P}\times\text{R}\times\text{T}}{100}$
$\text{S.I.}=\frac{\text{x}\times10\times10}{100}$
$\text{S.I.}=\text{Rs. x}$
Amount = S.I. + P
= x + x
= Rs. 2x
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