3. In what time will the interest on Rs 4000 become Rs 800 at the rate of 5% per annum? ?
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Answer:
4 years
Step-by-step explanation:
Principal = rs 4000
SI = rs 800
Rate = 5%
time = SI × 100/ Principal ×rate
time = 800×100/4000×5
time = 4 years
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