Question

If the amount is 2 1/4, times the sum after 2 years at C. I, the rate of interest per annum is ​

Answer 1

Answer:

Solution

Correct option is D)

As we know that,

A=P(1+

100

r

)

t

Here,

A=2

4

1

P

=

4

9

P

t=2 years.

Now apply the formula,

A=P(1+

100

r

)

t

⇒

4

9

P=P(1+

100

r

)

2

⇒

4

9

=(1+

100

r

)

2

Taking square root both sides of above equation,

⇒

2

3

=(1+

100

r

)

⇒

100

r

=

2

3

−1

⇒

100

r

=

2

1

⇒r=50%

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