Question

Find the rate of interest if p 48000,t 4 years and I 6400

Answer 1

Step-by-step explanation:

Let the sum be x and the rate be r

Given, Amount in 2 years =x(1+

100

r

)

2

=4800...(I)

and the amount in 4 years =x(1+

100

r

)

4

=6400...(II)

Let us divide equation (I) by equation (II)

⇒

x(1+

100

r

)

4

x(1+

100

r

)

2

=

6400

4800

⇒(1+

100

r

)

2

=

3

4

⇒1+

100

r

=

3

2

⇒

100

r

=

3

2

−1

from (I),

⇒x(1+

3

2

−1)

2

=4800

⇒x×

3

4

=4800

∴ x=Rs.3600

Answer 2

Answer:

the rate of interest is 36000

Step-by-step explanation:

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