1.

A sum of money double itself in 4 year in how many years will it become threefold?

Answer» LET sum =RS 100!= p

after 4 years sum will = RS 200 = amount
TIME given = 4 yrs

t= p/r
4 =100/R
4R=100
R= 100/4
R = 25%

now ...P=100. amt = 300 ,,R= 25%

n-1= 300-100= rs 200

=200/25*100
= 0.08
= 8 yrss...

pls brainliest it !!


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