Question

A certain sum doubles in 10 years at S.I. the rate of interest is​

Answer 1

Answer:

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Answer 2

Answer:

Since sum double itself in 10 years, so sum = S.I. for 10 years.

Let sum =x. Then, S.I. =x and Time =10 years.

∴Rate=(

x×10

100×x

)% =10%

Now, sum =x, S.I. =2x, Rate =10%

∴ Time =(

x×10

100×2x

)years=20 years.

Step-by-step explanation:

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