Question

please solve the question step by step in a copy . with solution

Answer 1

since number of years=rate of interest,

let number of years=rate of interest=A,


then according to the question, we have

interest=(Principal × rate of interest × time)/100,


432=(1200×A×A)/100,

43200=1200×A²,

43200/1200 = A²,

36=A²,

√36=A,

then

A=6,

therefore

time period=A=6 yrs

Answer 2

I have given the answer as an attachment.

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