Quantitative Aptitude - Arithmetic Ability Questions

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

In what time will a 100 metre long train running with a speed of 50 km/hr cross a pillar?

There were 24 studentsina class. One of them, who was 18 years old, left the class and his place was filled up by a new comer.Ifthe average of the class was thereby lowered by 1 month, the age of new comer is-

If the age of Rahul is 5 years more than his friend Ajay's age and the age of Rahul's wife is 6 years less than Rahul, and Ajay's wife is 1 year older than Rahul's wife, then which of the following statements is true?

Sumit and Amit undertook a work for Rs 7200. Sumit alone can do the work in 5 days and Amit alone can do the work in 4 days. If they work together,then what will be the difference (in Rs.) in the amount they receive?

Length and breadth of a rectangle are increased by 40% and 70% respectively. What will be the percentage increase in the area of rectangle?

The point at which the perpendicular bisectors of the sides of a triangle intersect is known as _____________________

In a week, how many times are the hands of a clock at right angles with each other?