Question Text
Question 1 :
Find the area of the shaded region in figure, where radii of the two concentric circles with centre O are $7$cm and $14$cm respectively and $\angle AOC=40^o$.<br>
Question 2 :
The length of a rectangular hall is $5$ metres more than its breadth. If the breadth of the hall is $25$ metres, then the area of the hall is _________ .
Question 3 :
If the area of a triangle equals the area of a rectangle and the area of the rectangle equals that of a square, then the area of the triangles also equals the area of the square.<br/>
Question 4 :
A square and an equilateral triangle triangle have equal perimeters. If the diagonal of the square is $12\sqrt{2}$ cm, then area of the triangle is
Question 5 :
The length and breadth of a rectangular field are $260m$ and $130m$ respectively, then its area (in hectares) is ______ .