Question

In how much time will a certain sum be 1.5 times the principal at 10% per annum?

Answer 1

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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Answer 2

Hey Dear☺️

Here is your answer...⤴️⤴️⤴️

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