Question

how long will it take a certain sum of money to triple itself at 13 1/3% per annum simple interest​

Answer 1

Answer:

Step-by-step explanation:

Let the sum of money be x

Amount = 3 × Rs x

= Rs 3x

Interest = Amount – Principal

= Rs 3x – Rs x

= Rs 2x

Rate = 13  1/3  % p.a.

= 40 / 3 % p.a.

Time (T) = (I × 100) / (P × R)

= (2x × 100) / x × (40 / 3) years

On further calculation, we get,

= (2 × 100 × 3) / 40 years

= (100 × 3) / 20 years

We get,

= 5 × 3 years

= 15 years

Answer 2

Answer:

Let the principal be x

amount(as given) = 3x

as we know SI=A-P

therefore, 3x-x=2x(SI)

now,T = 100×SI÷P×R

P=x, SI = 2x,R= 40/3%

therefore,

• 100×2x×3

x×40

=

600

40

=

15 years

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