Advertisements
Advertisements
प्रश्न
The formula used to find the area of the circle is ________ sq.units
पर्याय
4πr2
πr2
2πr2
πr2 + 2r
उत्तर
The formula used to find the area of the circle is πr2 sq.units
APPEARS IN
संबंधित प्रश्न
Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is ₹ 15/m2. (Take π = 3.14)
A rectangular plot measure 125 m by 78 m. It has gravel path 3 m wide all around on the outside. Find the area of the path and the cost of gravelling it at` ₹ 75 per m^2`
Find the area enclosed between two concentric circles of radii 3.5 cm and 7 cm. A third concentric circle is drawn outside the 7 cm circle , such that the area enclosed between it and the 7 cm circle is same as that between the two inner circles . Find the radius of the third circle correct to one decimal place.
AB is a chord of a circle with centre O and radius 4 cm. AB is of length 4 cm. Find the area of the sector of the circle formed by chord AB.
If a square is inscribed in a circle, what is the ratio of the areas of the circle and the square?
The area of the largest triangle that can be inscribed in a semi-circle of radius r, is
What is the diameter of a circle whose area is equal to the sum of the areas of two circles of diameters 10 cm and 24 cm?
A chord of a circle of radius 14 cm a makes a right angle at the centre. Find the area of the sector.
The radius of a circular wheel is 42 cm. Find the distance travelled by it in :
(i) 1 revolution ;
(ii) 50 revolutions ;
(iii) 200 revolutions ;
Is the area of the largest circle that can be drawn inside a rectangle of length a cm and breadth b cm (a > b) is πb2 cm2? Why?