Question 522878

let principal be x 
n=4 years 
r= 5% p.a 

SI= x*4*5/100
SI= x/5

II deposit

Principal =x
r=7
n= 3 1/2 years = 7/2 years
Si= (x*7*7)/(2*100)
SI=49x/200

II deposit  interest -I deposit interest =225

49x/200 -x/5 =225
LCD = 200
multiply by 200 to eliminate the denominator
49x-40x=225*200
9x=225*200
x=225*200/9
x= Rs 5,000 the principal

m.ananth@hotmail.ca