A train passes two bridges of length 400 m and 200 m. in 50 seconds and 30 seconds respectively. The length of the train is-

Marked price of an item is Rs 200. On purchase of 1 item discount is 22 % on purchase of 4 items discount is 33 % Rabia buys 5 items, what is the effective discount? 

498 is 17 % less than a number then the number is: 

The measure of each of two opposite angles of a rhombus is 60° and the measure of one of its sides is 10 cm. The length of its smaller diagonal is: 

Mohan purchased an article and sold it for Rs 2817.50 and earned 15% profit on the cost price. What was the cost price of the article?

A 240 m long train crosses a 300 m long platform in 27 seconds. What is the speed of the train in km/h?

What should come in place of the question mark (?) in the following question?
19.5% of 524 = 50% of ?