Question

At what rate of interest per annum will simple interest be half of the principal in 5 years ?

Answer 1

Solution:

Let the principal be P

A.T.Q


Let the simple interest be S.I= P/2

Let rate of interest be R

Here time, T= 5 years

We know, S.I =( P×R× T)/100

P/2=( P× R× 5)/100


1/2= 5R /100

100/2 = 5R


50 = 5R


R= 10

Hence , the rate of interest (R) =10%

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Hope this will help you...

Answer 2

hi,
please see the pic