Question

At what rate per cent per annum simple interest will a sum treble itself in 16 years?
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Answer 1

Answer:

Rate is 12.5 %

Step-by-step explanation:

Let Rs x 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.=  P x R x T / 100

S.I.= x x R x 16 / 100

R = 2x x 100 / x x 16

Rate = 12.5 %