Quantitative Aptitude - Arithmetic Ability Questions

If 1/√(1 -­ sin2A) = x, then the value of x is

What is the value of 9991 x 10009?

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 volume of a cube is 166.375 cm3. Find its side (in cm).

The total surface area of a hemisphere is 166.32 sq cm, find its radius?

A bus is running at a speed of 90 kmph. What distance will it cover in 20 seconds?

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?

tan3A is equal to