A man earns a profit of 60% when he sells an article at 4/3 of the original selling price. Find the percent profit he makes at original price.

If  $$\sqrt{a}+\sqrt{b}=15 \ and \ (\sqrt{a}-\sqrt{b} )=3$$ then the value of $$\sqrt{ab/4} $$ is 

If a number is increased by 30 % and after that it is decreased by 25 % and again it is increased by 25 % then find average change in percentage? (approx.) 

Study the following graph carefully to answer the given questions

Q and S work together for 5 days, the rest of the work is finished by M in two more days. If they get Rs. 6000 as wages for the whole work, what are the daily wages of Q, S and M respectively?

Study the following graph carefully to answer the given questions

The efficiency of L is 25% more than P. L started a work alone and then P joined her 5 days before actual completion of the work. For how many days L worked alone?

If A:B = $$ {3\over 4}$$ : $$ {5\over 2}$$  and B:C= $$ {1\over2}:{3\over 5}$$ then what is the ratio of A:B:C=?

Find the cost in rupees for carpeting a room 65dm× 30 dm at Rs. 45 per sq.m

If x + y + z=1, xy+yz+zx=-26 and x³ + y³+z³=151, then what will be the value of xyz?