Soal SMA · Soal cerita · Kesulitan 2/5

A sum of money is invested at 5% simple interest per year. After 3 years, the total interest earned is $150. What was the principal amount?

A.$500
B.$800
C.$1000
D.$1500

Kunci jawaban & pembahasan

Jawaban: $1000

Simple interest = Principal × rate × time. 150 = P × 0.05 × 3 = 0.15P. So P = 150 / 0.15 = $1000.

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