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If we decrease the radius of a circle by 20%, then its circumference will be reduced by :
New radius
New circumference
Change
If we increase the radius of a circle by 40%, then its area will be increased by :
New radius
New area
Increase in area
% in area
The perimeter of the sector of a circle whose central angle is 45Â° and radius 7 cm is :
If a quadrant is cut off from the circle of circumference 44 cm, then area of the remaining portion is :
Area of quadrant
Area of remaining portion
The length of the minute hand of a clock is 5 cm. Find the area swept by the minute hand during the time 6:05 am and 6:40 am
The length of a wire in the form of an equilateral triangle is 44 cm. If it is rebent into the form of a circle, then area of the circle is :
Perimeter
Area
Assume that an umbrella is a flat circle of radius 40 cm. If the umbrella has 8 ribs, then the area of a rib is :
Area of circle
Area of rib
Area of a quad rant of a circle whose circumference is 22 cm is : \(\left(\pi=\dfrac{22}{7}\right) \)
Area
Area of quadrant
If the diameter of a semicircular protractor is 14 cm, then the perimeter of the protractor is :
Perimeter
The perimeter of a quadrant of a circle of radius \(\dfrac{7}{2}\ cm \) is:
In the figure, are of shaded region is :
If a wire is bent into the shape of a square, then the area enclosed by the square is \(81\ cm^2 \). When the same wire is bent into a semiâ€“circular shape, then the area enclosed by the semi circle will be
Area
The circumference of a circle is 100 cm. The side of a square inscribed in the circle is :
side
If the perimeter of a semicircular protractor is 36 cm, then its diameter is :
diameter
The diameter of a circle whose area is equal to the sum of the areas of the two circles of radii 40 cm and 9 cm is :
Area
Diameter
The area of a sector of central angle \(x^o \) of a circle with radius 4r is :
Area
The area of a circle whose circumferenc is 44 cm is :
Area
If the circumference of a circle of radius r and the perimeter of a square of side â€˜aâ€™ are equal, then the ratio of area of the circle to that of the square is :
Ratio
The number of rounds that a wheel of diameter \(\dfrac{7}{11}m \) will make in going 4 km is:
circumference
No. of rounds
Two parallel lines touch the circle at points A and B respectively. If area of the circle is \(25\pi\ cm^2 \), then AB is equal to :
The minute hand of a clock is 21 cm long. The distance moved by the tip of the minute hand in 1 hour is :
Distance
The perimeter of a quadrant of a circle of radius r is
Perimeter of a circle
Perimeter of a quadrant
The area of the circle that can be inscribed in a square of side 6 cm is :
Area
A wire is in the shape of a circle of radius 21 cm. It is bent to form a square. The side of the square is \(\left[\pi=\dfrac{22}{7}\right] \)
The outer and inner diameters of a circular ring are 34 cm and 32 cm respectively. The area of the ring is :
Area
If the circumference of a circle increases from \(2\pi \) to \(4\pi \), then its area is :
If circumference
area units
Area
Area becomes 4 times
The angle through which the minute hand of the clock moves from 8 to 8 : 35 is :
If the area and circumference of a circle are numerically equal, then the diameter of the circle is
units
diameter units