Question

At what rate simple interest 4 years some of many will become 4 time principle?​

Answer 1

Answer:

R = 75 %

Step-by-step explanation:

Let the principal be Rs. x

Let the Rate of Interest be R

Amount = 4 × Principal = 4x

We know that,

⇒ Amount = Simple Interest + Principal

⇒ 4x = Simple Interest + x

⇒ Simple Interest = 4x - x = 3x

Formula for calculating Simple Interest is :

⇒ SI = PRT / 100

⇒ 3x = ( x × R  4 ) / 100

⇒ 3x × 100 = 4Rx

⇒ 300x = 4Rx

⇒ R = 300x / 4x

⇒ R = 300/4 = 75 %

Hence the Rate of Interest is 75 %.

Answer 2

Step-by-step explanation:

The rate of interest will be

75%