An article is sold at a loss of 20 %. It yields Rs. 60 more when it is sold at a gain of 20 %. The cost price of the article is 

A car running at 7/11 of its own speed reached a place in 22 hrs. How much time could be saved if the car would run at its own speed?

A shopkeeper had 2000 kgs of rice. He sold a part of it at 11% profit and the rest at 17% profit, so that he made a total profit 15.2%. How much rice (in kgs) did he sell at 17% profit?

The angle of elevation of the top of two vertical towers as seen from the middle point of the line joining the foot of the towers are 60° and 30°, respectively. The ratio of the heights of the tower is

By selling a pen for Rs 105 there is a loss of 30%. At what price (in Rs) the pen must be sold in order to gain 30%?

The population of a town is 3,11,250. The ratio of women to men is 43: 40. If there are 24% literate among women and 10% illiterate, among men, the total number of literate persons in the town is : 

If x²+y²+z² = xy + yz + zx, then the value of $${3x^4+7y^4+5z^4}\over{5x^2y^2+7y^2z^2+3z^2x^2} $$ is

If A and B are the HCF and LCM respectively of two algebraic expressions x and y, and A + B = x + y, then the value of A³ + B³ is