Question

In what time a sum of money double itself at 25/4 %p.a. simple interest
a) 5years
b) 8years
c) 12years
d) 16years​

Answer 1

Answer:

Principal = P, Amount = 2 p

Simple interest = A - P = 2 p – p = p

Time = (100 × S.I)/(P × R) = ( 100 × P)/(P × (25/4)) = 100/(25/4) = 16years

(d) 16 Years ans.

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Answer 2

Answer :

Let the principal be x .

Amount = 2x

S.I. = A - P = 2x - x = x

Time = $\frac{S.I. * 100}{P*R}$

        =  $\frac{x*100}{x*\frac{24}{4} }$

         = $\frac{x*100*4}{25*x}$

         = 16 years Ans

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