For any two real numbers a and b.

a-b2+b-a2 is

The angles of depression of two ships from the top of a light house are 60° and 45° towards east. If the ships are 300 m apart, the height of the light house is

The simplified value of 3-212-18 - 13 × 27 - 12 x 273 is closest to

Three runners A,B and C run a race, with runner A finishing 12 meters ahead of runner B and 18 meters ahead of runner C, while runner B finishes 8 meters ahead of runner C. Each runner travels the entire distance at a constant speed. The length of the race is

What is the effective discount (in %) on two successive discounts of 20% and 10%?

The ratio of angles of a triangle are 1 : 2/3 : 3. Then the smallest angle is

If tan (5x ­- 10°) = cot (5y + 20°), then the value of x + y is

The successive discount of 15%, 20% and 25% on an article is equivalent to the single discount of

A car takes 5 hours to cover 100 kms distance at a particular speed whereas another car takes 3 hours to reach a particular distance at the same speed. Find the distance.