Quantitative Aptitude - Arithmetic Ability Questions

The circumference of a circle is 110 cm. Find its radius (in cm).

A solid brass sphere of radius 2.1 dm is converted into a right circular cylindrical rod of length 7cm. The ratio of total surface areas of the rod to the sphere is

A sump is filled by three tankers with uniform flow. The first two tankers operating simultaneously fill the sump in the same time during which the sump is filled by the third tanker alone. The second tanker fills the sump 5 hours faster than the first tanker and 4 hours slower than the third tanker. The time required by the first tanker is:

The value of (2+32-3-342) is

One-third of Poojitha's age three years ago plus one-half of her age two years from now is twenty years. How old is she now?

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

In ∆ABC, ∡A + ∡B = 75 and ∡B + ∡C = 140, then ∡B =

Two chords AB and PQ of a circle intersect at D inside a circle. If AD = 4 cm, DB = 6 cm, QD = 3 cm, the length of PQ is equal to