Question

At what rate of simple interest will the money triple itself in 20 years

Answer 1

Let Principle = x

Then Given ;

• SI = 3x
• R = ?
• T = 20 yrs.

Thus SI = PRT/100

• 3x = (x × R × 20)/100
• 3 = 20R/100
• 3 = R/5
• R = 15%

#answerwithquality

#BAL

Answer 2

let the principle be rs x

Amount = rs 3x

SI = A – P

= 3x– x

= 2x

$SI = \frac{p \times r \times t}{100} \\ 2x = \frac{x \times r \times t}{100} \\ R = \frac{2x \times 100}{x \times 20} \\ R = 10\%$