Question

The value of a machine depreciates 10% every year. if its present value is 35100. what was its value year ago.

Answer 1

Let us suppose the value of the machine an year ago=x.
It's 10% will be x*10%=x/10
If we analyze the question we can say that
X-X/10=35100
9X=351000
X=35100/9
Therefore X= Rs. 39000

Answer 2

Answer:

The value of the machine a year ago was Rs.39000

Step-by-step explanation:

Let the value of the machine a year ago be x. Given that 10% of machine’s value depreciates every year.

Thus, 10% of x $=\frac{10}{100} x=\frac{x}{10}$

According to the given data, 10% is depreciated from machine’s value every year.

$\therefore x-\frac{x}{10}$ = Present value.

$x-\frac{x}{10}=Rs.35100$

By taking LCM, we get,

$\frac{10 x-x}{10}  =Rs.35100$

$\frac{9 x}{10} =Rs.35100$

We need only the value of x, so shift the other terms to the right hand side.

$x=\frac{35100 \times 10}{9}$

$\therefore x=Rs.39000$

Thus, the value of the machine a year ago was Rs.39000