A sum of money doubles it self in 3 years. At same rate of simple interest, for a period of 9 years how many times will this sum become
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Let the sum be rs x
t=10yrs
amount =2x
si=a-p
=2x-x
=x
rate= x/x*100/10
=10%
sum is x
amount =3x
si=3x-x
=2x
time=2x/x*100/10
=20years
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