A. 17.5cm
B. 21cm
C. 28cm
D. None of these
Related Mcqs:
- There are two circles of different radii. The area of a square is 196 sq.cm, whose side is half the radius of the larger circle. The radius of the smaller circle is three-seventh that of the larger circle. What is the circumference of the smaller circle ?
A. 12 π cm
B. 16 π cm
C. 24 π cm
D. 32 π cm - The circumferences of two circles are 264 meters and 352 meters. Find the difference between the areas of the larger and the smaller circles.
A. 4192 sq m
B. 4304 sq m
C. 4312 sq m
D. 4360 sq m - The area of a circle is increased by 22Sq.cm when it’s radius is increased by 1cm. The original radius of the circle is_________?
A. 6cm
B. 3.2 cm
C. 3 cm
D. 3.5 cm - The length of a rectangle is two – fifths of the radius of a circle. The radius of the circle is equal to the side of the square, whose area is 1225 sq.units. What is the area (in sq.units) of the rectangle if the rectangle if the breadth is 10 units?
A. 140
B. 156
C. 175
D. 214 - The areas of two similar triangles are 12 cm2 and 48SQ. cm .If the height of the smaller one is 2.1cm than the corresponding height of the bigger one is_________?
A. 0.525cm
B. 4.2cm
C. 80%
D. 60% - A paper is in a square form whose one side is 20 cm. Two semi circles are drawn on its opposites as diameters. If these semi circles are cut down what is the area of the remaining paper?
A. (400 – 100π) cm2</sup
B. (400 – 2π) cm2</sup
C. (400 – 200π) cm2</sup
D. 200π cm2</sup - The ratio of the radius of two circles is 1: 3, and then the ratio of their areas is_________?
A. 1:3
B. 1:6
C. 1:9
D. 1:5 - The radius of a cylindrical vessel is 7cm and height is 3cm. Find the whole surface of the cylinder?
A. 308 sq cm
B. 220 sq cm
C. 440 sq cm
D. 132 sq cm - The perimeter of a semi circle is 144 cm then the radius is_________?
A. 25 cm
B. 28 cm
C. 30 cm
D. 35 cm - The circumferences of two concentric circles are 176 m and 132 cm respectively. What is the difference between their radii?
A. 5 m
B. 7 m
C. 8 m
D. 44 m
