Question

please tell me who are intelligent in math please answer this




14. In 5 years, Rs. 2000 becomes Rs. 5000. In how many
years, at the same rate Rs.700 will become Rs.910 ?​​

Answer 1

Answer:

1 year

Step-by-step explanation:

Let rate be r.

Interest = 5000 - 2000 = 3000

We know PTR/100 = Interest

=> 2000×5×r / 100 = 3000

=> 10r = 3 × 100

=> r = 300/10 = 30%

Now let the time period be t.

Here interest = 910 - 700 = 210

=> 700×t×30 / 100 = 210

=> 210t = 210

=> t = 210/210 = 1 year.