Question

a sum of money becomes ten times itself at simple interest l, if the time period and rate of interest is equal, then find the annual rate of interest​

Answer 1

Step-by-step explanation:

I=PTR/100

let P = 1

and it becomes 10 times itself = 1×10=10

then SI (I) = 10-1 =9

and let time(T) and rate of interest(I) = Z

then,

I= PTR/100

9= 1×Z×Z/100

Z² = 900

Z = 30

ans= 30%