In how much time will a certain sum be 1.5 time the principal at 10% per annum.( Answer fast)

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Hi ,

let the principal ( P ) = Rs x

rate of interest per year = R = 10 %

Amount = A = 1.5 times of principal

A = Rs1.5 x

Time = T

we know that

A = P ( 1 + RT /100 )

substitute the given values

1.5 x = x ( 1 + 10 * T /100 )

15x /10 = x ( 1 + T /10 )

=>15x /10 = x/10 * ( 10 +T )

=>(15x / 10 ) * ( 10 / x ) = 10 + T

=>15 = 10 + T

=>15 - 10 = T

=>5 = T

Therefore ,

T = 5 years

i hope this will useful to you.
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