Area Related to...

If the circumference of a circle is $$\displaystyle \frac{30}{\pi }$$ then the diameter of the circle is 

The radius of a circle is $$14$$ m, then the circumference of a circle is 

The area of the sector of a circle whose radius is 6 m when the angle at the centre is $$\displaystyle 42^{\circ}$$ is 

The area of the shaded region

The area of a segment of a circle of radius $$21$$ cm if the arc of the segment has a measure of $$60^{\circ}$$ is
(Take $$\sqrt 3\, =\, 1.73$$)

The sides of a triangle are $$5$$, $$12$$ and$$ 13$$ units. A rectangle of width $$10$$ units is constructed equal in area to the area of the triangle. Then the perimeter of the rectangle is 

A square sheet of paper is converted into a cylinder by rolling it along its length. What is the ratio of the base radius to side of the square ?

In the given figure , AC is diameter of a circle with radius 5cm. If AB = BC and CD = 8 cm, the area of the shaded region to the nearest whole number is

A right angled isosceles triangle is inscribed in a circle of radius $$ r$$. What is the area of the remaining portion of the circle? 

In the diagram shown, $$ABCD$$ is a parallelogram and $$CDEF$$ is a rectangle. The total area of the whole figure is