Advertisements
Advertisements
प्रश्न
In the following figure, the shaded area is
विकल्प
50 (π−2) cm2
25 (π−2) cm2
25 (π+2) cm2
5 (π−2) cm2
उत्तर
In the figure,∠AOB = 90°
and radius of the circle = 10 cm
∴ Area of shaded portion = Area of quadrant AOB - area of ΔAOB
= `1/4pi"r"^2-1/2"r"^2`
= `1/4"r"^2(pi-2)`cm2
= `1/4xx10xx10(pi-2)`cm2
= 25 (π - 2) cm2
APPEARS IN
संबंधित प्रश्न
A rectangular park 358 m long and 18 m wide is to be covered with grass, leaving 2.5 m uncovered all around it. Find the area to be laid with grass.
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find the length of the arc. (Use π = `22/7`)
If the numerical value of the area of a circle is equal to the numerical value of its circumference , find its radius.
How many revolutions a circular wheel of radius r metres makes in covering a distance of s metres?
If the circumference of a circle increases from 4π to 8π, then its area is
If AB is a chord of length \[5\sqrt{3}\] cm of a circle with centre O and radius 5 cm, then area of sector OAB is
In the given figure, PSR, RTQ and PAQ are three semicircles of diameter 10 cm, 3 cm and 7 cm respectively. Find the perimeter of shaded region. [Use π= 3.14]
Find the lengths of the arcs cut off from a circle of radius 12 cm by a chord 12 cm long. Also, find the area of the minor segment.
A circular disc of radius 6 cm is divided into three sectors with central angles 90°,120° and 150°. What part of the whole circle is the sector with central angle 150°? Also, calculate the ratio of the areas of the three sectors.
If the radii of two circles are in the ratio of 4 : 3, then their areas are in the ratio of ______.
