find the principal (1)Amount.1089,time.7/2and rate ..6 years
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Sum after 2 years=Rs.1089
Sum after 3 years=Rs.1197.90
Interest for onr year=1197.90−1089=108.90
C.I for 1 year=S.I for 1 year
Interest=
100
PRT
⇒108.90=
100
1089×R×1
⇒R=
1089
108.90×100
=10%
Let the sum=Rs.x
Amount=Rs. 1089,Time 2 years,R=10%
Amount=P(1+
100
R
)
t
⇒1089=x(1+
100
10
)
2
⇒1089=x×
100
110
×
100
110
⇒x=
110×110
1089×100×100
=Rs.900
Step-by-step explanation:
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