Quantitative Aptitude - Arithmetic Ability Questions

From the top of a platform 5 m high, the angle of elevation of a tower was 30 deg. If the tower was 45 m high, how far away from the tower was the platform positioned?

The HCF of 36,54 and 108 is

Two pipes X and Y can individually fill a tank in 48 and 72 min respectively. If they are opened simultaneously, how long will it take for the tank to fill? 

The height of a cone is 24 cm and the area of the base is 154 cm2 . What is the curved surface area (in cm2) of the cone?

The HCF of 20, 28 and 48 is

The area of the triangle whose vertices are given by (2,4), (-3,-1) and (5,3) is

Select the odd word/letters/number/number pair from the given alternatives.

The lengths of two parallel sides of a trapezium are 21 cm and 9 cm. If its height is 10 cm, then what is the area (in cm2) of the trapezium?