Question

At what rate percent of si per annum will a sum of money be double itself in 8 years

Answer 1

HEY THERE!!

$\huge{\mathbb{SOLUTION:-}}$

Given:

→ Principal(P) = 100

→Amount (A) = 100+100
= 200

→ Time = 8 Years

➡ To Find:-

At what rate of money double?

➡ Method Of Solution;-

Let the actual money be 100

•°• Simple Interest =100

Also, Amount = 200

→ We know that SI = P × R × T /100

Now, Substitute the Given value in Simple Interest Formula.

SI = P × R × T /100

→ 100 = 100 × R × 8/ 100

→ 100 × 100 = 800 × R

→ 10,000 = 800× R

→ R = 10,000/800

→ R = 12.5 %

Hence, At 12.5 % of SI per annum will a sum of money be double itself in 8 years.

Answer 2

SI = P × R × T /100

=> 100 = 100 × R × 8/ 100

=> 100 × 100 = 800 × R

=> 10,000 = 800× R



=> R = 10,000/800

=> R = 12.5 %



Hence, At 12.5 % of SI per annum will a sum of money be double itself in 8 years!!