Question

If the values of any machines is decreased by 20% per an-
num. If expected values of this machine becomes Rs 6400
at the end of 2 year. Then calculate its real values.​

Answer 1

Answer:

10000

Step-by-step explanation:

let y be the price before 2 year

Hence

$6400 = y(1- \frac{decrease}{100})^n\\decrease = percentage decrease \\\\n = number of years\\6400 = y(1- \frac{20}{100})^2\\6400 = y(1- \frac{1}{5})^2\\\\6400 = y(\frac{4}{5})^2\\\\6400 = y* \frac{16}{25}\\\\y = 10000$