Triple the sum

At what rate a sum triples in 5 years at simple interest?

Correct answer:

p =  40 %

Step-by-step explanation:

r=31=2 t=5  t r1 a = r a  t r1 = r  r1=r/t=2/5=52=0.4  p=100 r1=100 0.4=40%



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