Question

find the rate of simple interest when [i] Rs 800 amounts to Rs 930 in 2 1/2 years [ii] the money doubles itself in 2 1/2 years​

Answer 1

Answer:

Hi ,

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Let the principle = x

Time = 20 years

R =?

and Amount A = 2x

We know that,

A = P ( 1 + TR /100)

2x= x ( 1+ 20 R /100)

2x / x = 1+ 20 R /100

2-1 = R / 5

R =5*1=5%

At 5% simple interest, a sum of money doubles itself in 20 years.