A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is ?
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we know that
A=P+I
where A=amount,P=principal,I=interest
let us consider...interest for 1 year is ` I`
so for three years it is
it will be
A1 =P+3I. ----> 815=P+3I
A2=P+4I------>854=P+4I
solving.. 2-1. we get
I=39
but we know that for three yeras it is
815=P+3I
where I is 39...3I is equal to 117
so 815= P+117
P=698
A=P+I
where A=amount,P=principal,I=interest
let us consider...interest for 1 year is ` I`
so for three years it is
it will be
A1 =P+3I. ----> 815=P+3I
A2=P+4I------>854=P+4I
solving.. 2-1. we get
I=39
but we know that for three yeras it is
815=P+3I
where I is 39...3I is equal to 117
so 815= P+117
P=698
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