Quantitative Aptitude - Arithmetic Ability Questions

In which of the following quadrilaterals only one pair of opposite angles is supplementary?

 In a fraction when 3 is added to its numerator and denominator it becomes 4/5. And it becomes 1/2 when 2 is subtracted from both the numerator and denominator. Find the fraction.

The centroid of a triangle is the point where

 Find the volume (in cm3) of a hemisphere of diameter 42 cm.

If the curved surface area of a right circular cone is 10010 sq cm and its slant height is 91 cm, find its total surface area.

In a triangle ABC, ∠A = 70°, ∠B = 80° and D is the incentre of ΔABC. ∠ACB = 2x° and ∠BDC = y°. The values of x and y, respectively are

Find the volume (in cm3) of a cuboid of length, breadth and height of 8.5 cm, 6 cm and 7 cm respectively.

Two pipes namely A,B can fill a sump in 25 minutes and half an hour respectively and a pipe C can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity off the tank is