Question

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$<h5 > question....$


1) Find the rate at which a sum of money gets doubled in 3 years compounded annually.


@ Prabhudutt


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Answer 1

hey mate

here is your answer!!!

let the principal be x

thus,amount will be 2x

and hence

compound interest will be x.

applying the formula

C.I=p(1+r/100)ⁿ

x=x(1+r/100)³

1=1+r/100

r=0 ℅(answer)

Answer 2

Answer:

26%

Step-by-step explanation:

Let the principal = P. Then, A = 2P and n = 3 years.

We know that A = P(1 + r/100)ⁿ

⇒ 2P = P(1 + r/100)³

⇒ 2 = (1 + r/100)³

⇒ (1 + r/100) = ∛2

⇒ (1 + r/100) = 1.26

⇒ r/100 = 1.26 - 1

⇒ r/100 = 0.26

⇒ r = 26%.

Therefore, Rate of interest = 26%

Hope it helps!