Question

sum of money becomes 3 times in 5 years .find the rate of interest .​

Answer 1

Answer:

The sum of money becomes 6 times in 12.5 years

Step-by-step explanation:

3 times ⇒ 100% to 300%

6 times ⇒ 100% to 600%

3 times in 5 years

⇒ (300 - 100)% in 5 years

⇒ 40% in 1 year

⇒ Rate of interest per annum = 40%.

Now, 

Time taken to become 6 times

⇒ (600 - 100)%/40%

⇒ 12.5 

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