Question

In a certain time a sum becomes 3 times at the rate of 10% per annum at what rate per annum the same sum becomes 6 times in same duration

Answer 1

Answer:

Rate = 25%

Explanation:

Let the sum be P

Then, for R = 10%

SI = (3P - P) = 2P

We know that,

S.I = $\frac{PRT}{100}$

Therefore,

2P = $\frac{P*10*T}{100} = \frac{PT}{10}$

Solve for T

⇒ T = 20 year s

Again, for another rate (R)

SI = (6P - P) = 5P

∴ 5P = (P x R x 20)/100

⇒ R = 25%

So, rate is 25 percent.

That's the final answer.

I hope it will help you.