Question

rupees hundred doubles itself in how many years at the rate of 20% per annum simple interest?​

Answer 1

Answer:

$\boxed{\text{Answer: Time it will take for the money to double = 5 years}}$

Step-by-step explanation:

$\boxed{\text{Interest = }\frac{PRT}{100}}\\\\\\\text{Double of Rs. 100 = 2 x 100 = Rs. 200}\\\\\text{Therefore, the new amount we must obtain = Rs. 200}\\\\\boxed{\text{We also know: Amount = P + I}}\\\\\text{Hence, 200 = 100 + I}\\\\\text{So, I = Rs. 100 and the given R is 20 percent}\\\\\text{Substituting in the formula we get:}\\\\\text{100 = }\frac{100 \text{ x } 20 \text{ x T}}{100}\\\\20T = 100\\\\\boxed{\text{Answer: T = 5 years}}$

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