Question

the sum of money Doubles itself in 12 years find the rate%​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Let the principal be 100₹

So,

Amount in 12 years = 200₹

&

Interest in 12 years = 100₹

Time = 12 years

So,

Rate of interest = (interest × 100) / (principal × time)

=> rate = (100 × 100) / (100 × 12)

=> rate = 100/12 = 25/3 = 8*1/3 %

So, rate of interest is 8*1/3%

Check :

Let principal be 200₹

Time = 12 years

Rate = 8*1/3% = 25/3 %

Interest = PRT/100

= 200 × 25 × 12 / (100× 3)

= 2 × 25 × 4 = 200

So, amount = principal + interest

= amount = 200 + 200 = 400₹

So, we can see amount is doubled in 12 years with this rate of interest.