Question

if 11% is lost on books sold at Rs 10.68, what was the cost price of the books? At what price should they be sold at to yield a profit of 10% ?​

Answer 1

Answer:

Rs. 13.2

Step-by-step explanation:

For 11 % Loss =

$11\% \: = ( \frac{cp - sp}{cp} ) \times 100$

$11\% = (1 \: - \frac{sp}{cp} ) \times 100$

$\frac{11}{100} = (1 - \frac{sp}{cp} )$

$\frac{sp}{cp} = 1 - \frac{11}{100}$

$cp \: = \frac{sp}{1 - \frac{11}{100} }$

As SP = 10.68

$cp \: = \frac{10.68}{0.89} = 12 \: rs.$

Now for 10% Profit SP should be

CP* 1.1 = 13.2 Rs.