Development of precision GIS/GPS auto negative systems

'X' covers 300 km is 'a' hours and 'Y' covers 'd' km in 'b' hours. Find a:b

Statement I: d = 500

What is the speed of stream?

I   Sum of time taken by a boat in upstream and downstream is 46 hrs to cover distance 460 km in each. 

'Anoop, Bittu, Chetan, and Danny' are the four staff members. Find "Danny's" current age.

There are 7 people in a group. Average age of the group decreases by 5 when two more people join the group. Find the average age of the new group.

By selling a product for Rs.520 how much profit was earned?

I. 12% discount on the market price.

II. The profit was one- third of the cost price.

What is the exact average of x, 53, 93, 24, q and y?

I. x is five more than y.

II. y is six less than q.

What is the area of the circular Track?

Statement-I: The area of equilateral triangle that can be inscribed in circular Track is 48√3 m2

How much time will Bus A take to cross Bus B (from the moment they meet) running in opposite directions (towards each other)?

There are two cylindrical rollers - bigger and smaller. How many rotations will the bigger roller take to flatten a stretch of land (X)?

What is the speed of a train?

I. The train crosses a pole in 24 seconds.

II. The train crosses a platform of equal length in 48 seconds.