If the radius of sphere is increased by 50%, then by how much per cent the surface area will increase?
100
125
150
200
A rectangle ABCD is divided into two equal parts horizontally. Upper part is divided into again three equal parts and lower part is divided into five equal parts. Find out the shaded part of rectangle ABCD.
A circle and a square have the equal perimeter, then
the area of circle is greater.
the area of square is greater
Both have equal areas
Cannot be compared
A.
the area of circle is greater.
Given the perimeter of a circle is equal to that of a square
4a = 2r [ where a is the side of the square and r is the radius of the circle ]
a=
Now Consider the areas of the two
Area of the square : ( a2 ) =
=2.46r2 [ obtained by putting the value of ]
Area of circle = r2
=3.14r2
hence the circle will have the greater area .
Which point is not included in the professional skills of a teacher?
Self-knowledge
To experiment well
Dedication
Satisfactory knowledge of social matter