Question

5. A certain sum of money doubles in 10 years. In how many years will it triple it self​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

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Step-by-step explanation:

Assuming simple interest, let the amount be P and rate of interest per annum be R%.

Given that P becomes 2P in 10 years.

=> P + PX10X[math]{R \over 100}[/math] = 2P

=> 1 +[math]{R \over 10}[/math] = 2

=> R = 10

Let P triple itself in N years:

=> P + PXNX[math]{10 \over 100}[/math] = 3P

=> 1 +[math]{N \over 10}[/math] = 3

=> N = 20 years