Question

at what rate percent per annual simple interest will a sum triple itself in 15 years​

Answer 1

Answer:

Let Rsx be the sum, then according to question, the amount will be Rs3x. Then simple interest will be,

S.I.=Amount−Principle

=3x−x

=2x

The time is given as 16 years.

S.I.=

100

P×R×T

2x=

100

x×R×16

R=

x×16

2x×100

R=12.5%

Step-by-step explanation:

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Answer 2

Answer:

R = (Simple Interest × 100) ÷ (Sum × Time)

Let the sum be 100

If the sum will be tripled then 100 × 3 = 300

Then, the simple interest will be Total sum - Sum

=> 300 - 100

=> 200 = Simple Interest

R = (200 × 100) ÷ (100 × 15)

R = 20000 ÷ 1500

R = 40/3 % = 13 ¹/₃ % = 13.33 %  

Step-by-step explanation: