Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd letter/letters from the given alternatives.

In a rhombus _____.

If A + B = 90 deg and Cos B = 1/3, then the value of Sin A is

Find the total surface area (in cm2) of a right circular cone of diameter 21 cm and slant height 11 cm.

The volume of a hemisphere is 19404 cm3. Find its diameter (in cm).

Pipes A, B and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hrs, respectively, the third can drain the cistern, when filled, in 6 hrs. If all the three pipes are opened simultaneously when the cistern is half-full, how many hours will be needed to fill the cistern?

The value of sec2θ + 2tanθcotθ - tan2θ is

The heights of a cone and a cylinder are equal. The radii of their bases are in the ratio 2:1. The ratio of their volumes is: