If a certain sum of money becomes 3 times in 20 years at simple interest, the rate of interest is: यदि कोई राशि साधारण ब्याज पर 20 वर्षों में 3 गुनी हो जाती है, तो ब्याज की दर क्या है?
A
8% (8%)
B
10% (10%)
C
12% (12%)
D
15% (15%)
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Correct Answer 10%
Explanation
Amount = 3P, so SI = 2P. Using SI = (P x R x T)/100, we get 2P = (P x R x 20)/100, R = 200/20 = 10%.