Question

find the principal when : amount =1089 , time =3 and half year , rate =6% per annum ​

Answer 1

Answer:

amount 1089

let principal P

then interest is 1089-P

principle I=PTR/100

HERE

T=7/2years

R=6%

substitute these values in the above principle

1089-P=(P*7/2*6)/100

1089-P=21P/100

21P/100+P=1089

121P/100=1089

P=1089X100/121

P=900 rupees