Question

plz solve the 6th one and plz do step by step explanations in every part​

Answer 1

Answer:

8 Years, 3 Months

Step-by-step explanation:

Let the sum be x.

Then, the amount to be returned is 2x. (double of sum)

Since, SI = Amount - Principal = x

Now, SI = P x R X T / 100

Or x = x * 12 * t (unknown value) /100

Now, since

time = 100 x SI / P x R, we have

t = 100 * x  / 12 * x

t = $\frac{100}{12}$

Time is equal to $\frac{25}{3} -- (after cancelling)$

which is $8 \frac{1}{4}$ years

or in other words 8 Years, 3 Months ($\frac{1}{4}$ of a year)