# A sells an article which costs him Rs. 400 to B at a profit of 20%. B then sells it to C, making a profit of 10% on the price he paid to A. How much does C pay B ?

$\par&space;C.P.&space;of&space;B&space;=&space;120\%&space;of&space;Rs.&space;400&space;=&space;Rs.$ $\left(\frac{120}{100}\times&space;400)\right)&space;=$ $\par&space;Rs.&space;480$

$\par&space;C.P.&space;for&space;C&space;=&space;110\%&space;of&space;Rs.&space;480&space;=&space;Rs.$$\left(\frac{110}{100}\times&space;480)&space;\right)=$ $\par&space;Rs.&space;528$