At what percentage of rate per annum simple interest,will a certain sum of money becomes double in 10 years ?
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Let Principal be P
So, amount after 10 years = 2P
So, interest in 10 years = 2P-P = P
So, 1 year SI = P/10
As, SI = PRT/100
So, P/10 = PR/100
Dividing P on both sides we get
1/10 = R/100
So, R = 1/10*100 = 10
Answer: At 10% p.a rate
So, amount after 10 years = 2P
So, interest in 10 years = 2P-P = P
So, 1 year SI = P/10
As, SI = PRT/100
So, P/10 = PR/100
Dividing P on both sides we get
1/10 = R/100
So, R = 1/10*100 = 10
Answer: At 10% p.a rate
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