Quantitative Aptitude - Arithmetic Ability Questions

A trader had 12 quintals of wheat. He sold a part of it at 13% profit and the rest at 23% profit, so that he made a total profit of 17 %. How much wheat did he sell at 23% profit?

The distance between places U and V is 1008 km. An express train leaves place U at 9:00 a.m. and runs at a speed of 126 km/hr. The train stops on the way for 20 minutes. At what time (in p.m.) the train will reach at the place V?

To cover a distance of 234 km in 1.6 hours what should be the average speed of the car in meters/second?

Car B is running twice as fast as car A. If car A covers a distance of 90 km in 1 1/2 hrs, what is the speed of car B?

If 2x + (9/x) = 9, then what is the minimum value of x2+1x2 = ?

The area of the largest triangle that can be inscribed in a semicircle of radius 6m is

If x+1x:x-1x=5:3 then the value of x is

Select the related number from the given alternatives.
0.02 : 0.002 :: 1/3 : ?