The angle of elevation of the top of a tower from a point A on the ground is 30^o. On moving a distance of 20 m towards the foot of the tower to a point B, the angle of elevation increase to 60^o.The height of the tower is-

Mr. Mike borrowed Rs. 8500 at 4 % per annum compound interest. The compound interest compounded annually for 2 yeas is:

Directions: Study the following table carefully to answer the questions that follow .
Number of soldiers ( in thousands ) joining five different forces during six different.

In which force the number of the soldiers joining continuously increased from the year 2004 to 2009 ? 

If a side of a square is a, then what will be the area of the square on its diagonal?

The average weight of A B and C is 50 kg . if the average weight of A and B be 48 kg and that of B and C be 45 kg , then find the weight of B ?

Simplify $$ \sqrt{(1-sin^{2}θ) ÷(1-cos^{2}θ)}$$.

The average age of four sisters is 7 years. If the age of the mother is include, the average is increased by 6 years. Then the age of the mother is

What is the difference between 0.6 and 0.6%?