Advertisements
Advertisements
Question
Find the area of the following circle, given that diameter = 49 m.
Advertisements
Solution
Here, diameter = 49 m
∴ Radius r = `49/2 m`
∴ Area of circle = πr2
= `22/7 xx (49/2)^2`
= `22/7 xx 49/2 xx 49/2`
= `3773/2`
= 1886.5 m2
APPEARS IN
RELATED QUESTIONS
Find the perimeter and area of the quadrilateral ABCD in which AB = 17 cm, AD = 9 cm, CD = 12 cm, ∠ACB=90° and AC = 15 cm.
An archery target has three regions formed by three concentric circles as shown in figure. If the diameters of the concentric circles are in the ratios 1 : 2 : 3, then find the ratio of the areas of three regions.
In the following figure, an equilateral triangle ABC of side 6 cm has been inscribed in a circle. Find the area of the shaded region. (Take π = 3.14).
In the following figure, AB and CD are two diameters of a circle perpendicular to each other and OD is the diameter of the smaller circle. If OA = 7 cm, find the area of the shaded region.
In the following figure, two circles with centres A and B touch each other at the point C. If AC = 8 cm and AB = 3 cm, find the area of the shaded region.
In the following figure, the boundary of the shaded region consists of four semi-circular arcs, the smallest two being equal. If the diameter of the largest is 14 cm and of the smallest is 3.5 cm, find
- the length of the boundary.
- the area of the shaded region.
A square is inscribed in a circle. Find the ratio of the areas of the circle and the square.
In the given figure, ABCD is a rectangle with AB = 80 cm and BC = 70 cm, ∠AED = 90° and DE = 42 cm. A semicircle is drawn, taking BC as diameter. Find the area of the shaded region.
Diameter of a circular garden is 9.8 m. Find its area.
The area of a circle is 154 cm2. Its diameter is ____________.
