Question

A principle becomes twice of its amount in 10 years at a certain rate of simple interest, At the same rate of simple interest, that principle becomes thrice of its amount in

Answer 1

20 years

Step-by-step explanation:

Correct option is

C

20 years

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.