Question

at what rate of simple interest eill rs 4200 amount rs.6216 in a spam of 8 years

Answer 1

Principal=Rs.4200
Amount=Rs.6216
Time=8 years
Thus,Simple intrest=Amount-principal
=RS.(6216-4200)
=Rs.2016
We know that,S.I. =P×R×T /100
A/Q=>2016=4200×r×8/100
therefore ,Rate of interest=2016×100/4200×8
=>6%

Answer 2

SI=p×t×r/100
r=100×I/p×t
A=6216
p=4200
SI=A-P =6216-4200=2016
r=100×2016/4200×8
r=6%