20. In how many years will * 150 double itself at 4% simple interest ?

1.	20. In how many years will * 150 double itself at 4% simple interest ?At what rate of simple interest will a sum of money double itself in 20 years2. If 250 amounts to F 295 in 2 years find the rate ner cent per annum.
Answer» Et the sum be 100.100. Then double the sum means, 200.200. From the above we can say that for 2020 years the amount is 200200 and the interest is 100100 for 2020 years. for one year the interest is 5.5. We can easily say that, 55 is 5%5% of 100.100. Therefore rate of interest is 5%5% or let sum=100,100 then using given data, for 2020 years,amount = sum + interest =22(sum)=200200 therefore interest is 100100 for 2020 years. For one year it is 55Then interest =5100×100=5%5/100×100=5% It will be5/100×100=5%

20. In how many years will * 150 double itself at 4% simple interest ?At what rate of simple interest will a sum of money double itself in 20 years2. If 250 amounts to F 295 in 2 years find the rate ner cent per annum.

Answer»

Et the sum be 100.100. Then double the sum means, 200.200.

From the above we can say that for 2020 years the amount is 200200 and the interest is 100100 for 2020 years. for one year the interest is 5.5.

We can easily say that, 55 is 5%5% of 100.100. Therefore rate of interest is 5%5%

let sum=100,100

then using given data, for 2020 years,amount = sum + interest =22(sum)=200200

therefore interest is 100100 for 2020 years. For one year it is 55Then interest =5100×100=5%5/100×100=5%

It will be5/100×100=5%