Quantitative Aptitude - Arithmetic Ability Questions

Find the radius of the circle if the area of its sector is 30.8 sq cm whose corresponding central angle is 72°?

Ram cycles 5 km in the south, and turns left to travel 5 km further. From there, he takes a right turn and travels 5 km more. How far is he from his original position?

A solid cone of height 24 cm and radius of its base 8 cm is melted to form a solid cylinder of radius 6 cm and height 6 cm. In the whole process what
percent of material is wasted?

A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease?

cot2A + cos2A is equal to

In a circle, a diameter AB and a chord PQ (which is not a diameter) intersect each other at X perpendicularly. If AX : BX = 3 : 2 and the radius of the circle is 5 cm, then the length of chord PQ is

If A = 400 and B = 600, then A is how much percentage less than B?

20 boys do one fourth of work in 25 days. How many more boys will be required to complete the remaining work in 50 days?