what sum will become 1416rs at 91/2% per annum after 5years?

Question

this is the question from chapter simple interest.

Answer 1

????????????? "annum"  ????????? me dont du obsoleet Latin

????????? "rs" ???????? is zat munee?????

????????? 91/2% ?????????? is zat spozed tu be 9.5% ????????

???? is zat simpel interest ????

1416$ at 9.5%/yeer for 5 yeers simpel interest

interest=671.65$

But if yu start with x$, yu want x+interest=1416

eech $ get interest=0.095*5=0.475

so 1.475x=1416

x=1416/1.475

x=960