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Step-by-step explanation:
given = si = 450 ,rate of interest = 3% per annum
let , the principal be = x
As we know that ,S.I = p×r×t/100
= 450 = x×3×3/100 =45000= x×3×3 = 45000/3 = x× 3 = 15000 /3 = x = 5000
therefore , x or principal= 5000
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