In 4 yr. ? 6000 amounts to ? 8000. In what time at the same rate, will ? 525 amount to ? 700?

Amount = ? 8000
Time (T) = 4 yr; Principal (P) = ? 6000
Simple interest (SI) = (A - P)
= Amount - Principal
= 8000 - 6000 = ? 2000

Rate (R) = ?
According to the formula. SI = (P x R x T)/100
? 2000 = (6000 x R x 4)
? R = (6000 x 100)/(6000 x 4) = (25/3) %

Now, again Amount (A) = ? 700
Principle (P) = ? 525, Time (T) = ?
Rate (R) = 25/3%
Simple interest = A - P
? 700 - 525 = ? 175

Using formula, SI = (P x R x T) / 100
? 175 = [525 x (25/3) x T] / 100
? T = (175 x 100 x 3) / (525 x 25)
= 4 yr