Quantitative Aptitude - Arithmetic Ability Questions

A cylindrical vessel of height 5 cm and radius 4 cm is completely filled with sand. When this sand is poured out it forms a right circular cone of radius 6 cm. What will be the height of this cone? (Take π = 22/7)

What is the ratio of simple interest earned on certain amount at the rate of 12% for 6 years and that for 12 years?

The area of a semicircle is 308 sq.cm. Calculate its perimeter (in cm)

A merchant changed his trade discount from 25% to 15%. This would increase selling price by

The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observations is

A person while buying a dress on sale spends Rs. 45 and saves Rs. 5, what is the percentage of his savings?

AB is the diameter of a circle with center O and P be a point on its circumference. If ∡POA = 120°, then the value of ∡PBO is

What is the difference (in Rs) between the compound interests on Rs. 4000 for 1 year at 12% per annum compounded yearly and half-yearly?