Question

in what time will a sum double itself at 7 percent per annum simple interest?​

Answer 1

Answer:

The sum will double itself in 14.3 years.

Step-by-step explanation:

Let the principal be x

Therefore, Amount = 2x

And, Interest = Amount - Principal = 2x - x = x

Time = I×100/p×r

= x×100/x×7

= 100/7 = 14.3 years.(answer).

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Answer 2

Answer:

Let the principal = p

Amount = 2p

S.I = Amount - principal

= 2p - p

= p

Time = S.I × 100 / p × r

= p × 100 / p × 7

= 100/7 Ans ....