Quantitative Aptitude - Arithmetic Ability Questions

If x2+1x2 = 2, then the value of x - 1x is

What is the length of the arc whose central angle is 30° and radius of the circle is 21 cm?

What is the smplified value of Sin2A/1+Cos2A ?

If x = 6+26, then what is the value of x-1 + 1x-1 ?

A rectangular swimming pool of length 30 m and breadth 15 m has a uniformly sloping floor. It is 1 m in depth on one end of its length and 2 m at the other. How much water is needed to completely fill this pool?

A cuboid has dimensions 8 cm x 10 cm x 12 cm. It is cut into small cubes of side 2 cm. What is the percentage increase in the total surface area?

A wholesaler sells a watch to a retailer at a profit of 33% and the retailer sells it to a customer at a loss of 20%. If the customer pays Rs 2,181.2, what had it cost the wholesaler?

If the angle subtended by the radius of the circle and vertex B of the triangle ABC is 400. Then calculate the value of ∠BAC