Question

What principal will earn interest of 840rs at the rate 5 % per annum in 3 years

Answer 1

this should be your answer

Answer 2

guess I=840 ; r=5% ;t=3
so,
       I = prt/100
or,840=p*5*3/100
or,840=3p/20
or,3p=840*20
or,p=840*20/3
      =280*20
      =5600
 so the principle is 5600