Question

18. The price of a sewing machine decreases by 10% each year. If after 2 years, the price of
the sewing machine is 1620. what was its original price?​

Answer 1

Value final (A) = 1620

Rate decrease = 10%

Time = 2 years

Value initial (P) = ?

$A = P(1-\frac{r}{100} )^{2}$

1620 = $P(1-\frac{10}{100} )^{2}$

1620 = P $(\frac{90}{100} )^{2}$

1620 = P $(\frac{9}{10}*\frac{9}{10})$

1620 = $\frac{81P}{100}$

$\frac{1620*100}{81} = P$

2074.07 = P

ANSWER = 2074.07 Rs/-

Mark Brainliest.