Question

A sum of money amounts to 600 in 4 years
and to 650 in 6 years. Find the rate of interest
per annum.​

Answer 1

Answer:

ANSWER

A

2

=Rs600andA

4

=Rs800

In case of S.I.; A

n

=P+(n×I) [here, n=no. of years and I=simple interest in one year]

A

4

=P+4I⇒800=P+4I ...........eq(1)

A

2

=P+2I⇒600=P+2I ..........eq(2)

subtracting eq(2) from eq(1) we get

⇒200=2I

∴I=100

now substitutin I=100 in eq(2)

⇒600=P+2×100

⇒600=P+200

∴P=Rs400

hope it help .....

thank you^_^.....

Answer 2

Answer:

The rate of interest is 5%

Step-by-step explanation

Let the principal be x

Amount = Rs.600

Interest = Amount - Principal

Interest = 600-x

Time = 4 years

Amount = Rs.650

Interest = Amount - Principal

Interest = 650-x

Time = 6 years

So,

Substitute the value of x in A

Hence the rate of interest is 5%