Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

There is a decrease of 10% yearly on an article. If this article was bought 3 years ago and present cost is Rs. 5,832 then what was the cost of article at buying time?

a) Rs. 7,200
b) Rs. 7,862
c) Rs. 8,000
d) Rs. 8,500

Answer: c
Explanation: $$A = P {\left( {1 – \frac{R}{{100}}} \right)^n}$$
Where A = Value of goods after n years
P = Initial Price
R = Rate of depriciation
$$\eqalign{ & P = \frac{{5832}}{{{{\left( {1 – \frac{{10}}{{100}}} \right)}^3}}} \cr & P = \frac{{5832}}{{{{\left( {1 – \frac{1}{{10}}} \right)}^3}}} \cr & P = \frac{{5832}}{{{{\left( {\frac{9}{{10}}} \right)}^3}}} \cr & P = 5832 \times \frac{{10}}{9} \times \frac{{10}}{9} \times \frac{{10}}{9} \cr & P = 8000 \cr} $$

Join The Discussion