Question

A sum of money amounts to rs. 5200 in 5years and rs. 5680 in 7years at simple interest. what was the rate of simple interest charged per annum?

Answer 1

5680-5200=480=si
t=7-5=2
p=5200
480=5200×r×2/100
=480/104=r
=4.6%

Answer 2

Answer:

6%

Step-by-step explanation:

Here , A2 = ₹ 5680 , T1 = 5 years , A1 = ₹ 5200 , T2 = 7 years

R =

A1 - A2

× 100

A2T1 - A1T2

R =

5200 - 5680

× 100

5680 × 5 - 5200 × 7

R =

- 480

× 100

28400 - 36400

=

- 480

× 100

- 8000

R = 6%