Question

A sum of money invested at a certain rate of simple interest doubles itself in 10 years . In how much time will it treble itself at the same rate?​

Answer 1

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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