Question

13. If the money kept at simple
interest, triples in 25 years, then the
rate of interest is
O a) 8%


b) 10%
O c) 15%
O d) None of these​

Answer 1

Answer:

a) 8%

Step-by-step explanation:

let principle be x.

amount = 3x( triples)

interest = principle - amount

= 3x-x = 2x

SI = PTR/ 100

2x = 25x ×R / 100

100 is taken to LHS

200x = 25x × R

R = 200x / 25x

R = 8%