Question

The ratio of the amount for two years compound interest
and for I year under simple interest is 6.5, if the rate
of interest is same, then what is the value of rate
of interest.​

Answer 1

Answer:

20%

Step-by-step explanation:

Let the principle = P, Rate = x% per annume

⇒

P(1+

100

r×1

)

P(1+

100

r

)

2

=

5

6

(1+

100

r

)=

5

6

⇒

100

r

=

5

6

−1=

5

1

r=

5

100

=20

∴ rate of interest = 20%

Answer 2

Step-by-step explanation:

Answer:

20%

Step-by-step explanation:

Let the principle = P, Rate = x% per annume

⇒

P(1+

100

r×1

)

P(1+

100

r

)

2

=

5

6

(1+

100

r

)=

5

6

⇒

100

r

=

5

6

−1=

5

1

r=

5

100

=20

∴ rate of interest = 20%

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