Question

if ruppees 4000 amounts ruppees 5000 in 2 years, find the rate of simple interest per annum​

Answer 1

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Tanveer Sofi answered this

let the rate of simple interest per annum be r%.Then for principal(P), the amount after time t years isAmount=P+P×r×t100using; Amount=5000, P=4000,and t=2; as given in the question5000=4000+4000×r×2100⇒4000×r×2100=1000⇒80r=1000⇒r=12.5Therefore, the rate of simple interest is 12.5%