Question

a certain sum of money double itself at simple interest in 8 years.In how many years will it thrice at the same rate

Answer 1

Formulae=ptr/100
supppose m=ptr/100
m=2x
p=x
r=?
t=8
substitute value in 1
r=8 now m=3x
p=X
t=?
37r=8
sub the values
then t=37.5
that is after 37 years
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