Quantitative Aptitude - Arithmetic Ability Questions

The angle of elevation of an aeroplane from a point on the ground is 45°. After flying for 15 seconds, the elevation changes to 30°. If the aeroplane is flying at a height of 2500 metres, then the speed of the aeroplane in km/hr. is

If the measure of the interior angle of a regular polygon is 120 deg then how many sides does it have?

In a triangle the length of the side opposite the right angle is 6 cm, what is the length of the side opposite to the angle which measures 30°?

What is the altitude of an equilateral triangle whose side is 12√3 cm?

 Find the volume (in cm3) of a hemisphere of diameter 42 cm.

Two trains are moving in the same direction at the speed of 24 km/hr and 50 km/hr. The time taken by faster train to cross a man sitting in the slower train is 72 seconds. What will be the length (in metres) of the faster train?

A boat goes 15 km upstream and 10 1/2 km down stream in 3 hrs 15 min. It goes 12 km upstream and 14 km downstream in 3 hrs. What is the speed of the boat in still water?

Select the option that is different from the remaining three alternatives.