Sandeep's salary is 20% more than that of Aron. If Sandeep saves Rs.720 which is 4% of his salary, then Aron's salary (in Rs.) is

An article is sold at a gain of 16%. If it had been sold for Rs.400 more, 20% would have been gained. The cost price of the article is

A and B can do a piece of work in 40 days and 30 days respectively. They worked together for 12 days after that B was replaced by C. the work finish in next 8 days. In how many days C can alone finish the work?

The sum of two digit number is 16. If the digit is interchanged the number is formed 18 less than the original number. Find the original number.

The average of nine numbers in M and the average of three of these is P. If the average of remaining numbers is N, then

On increasing the radius of circle by 1 cm, its area is increased by 44 cm² .The original radius of the circle is -

Two vessels A and B contain spirit and water mixed in the ratio 5:2 and 7:6 respectively. Find the ratio in which these mixture be mixed to obtain a new mixture in vessel C containing spirit and water in the ratio 8:5?

A passenger train covers the distance between stations A and B, 50 minutes faster than a goods train. Find this distance between A and B if the average speed of the passenger train is 60 km/h and that of goods train is 20 km/h?