Question

at what rate percent per annum of simple interest will : a sum of money double in 5 year ?​

Answer 1

Answer:

the principal doubles at 20% interest

Step-by-step explanation:

let 'p' be the principal

the amount is doubled so, Amount=2p

since the interest = 2p - p = p

so the time is 5 years

we need to find the rate percentage

=100 * interest / principal * time

= 100 * p / p * 5

= 100 /5

= 20%

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