Question

After 5 year a man got 4/5th of his sum as simple interest. Find the rate of interest per annum.
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Answer 1

Answer:

Take principal as p and use formula SI x 100 ÷ P x T = R. therefore Rate of interest = 16%

Answer 2

Answer:

let sum be rs.x

s.l after 5years=rs.4x/5

time=5 years

r= s.i×100/p×t

=4x×100/5×x×5

=16%