If a circle and a semi-circle have the same radius of 14 cm, then the ratio of their perimeters is
3 : 1
2 : 1
10 : 9
11 : 9
The diameter of a circle is 8 cm less than its semi-circumference. Its radius is
3.5 cm
7 cm
5 cm
10.5 cm
The perimeter of a rhombus ABCD is 100 cm. If the length of the diagonal AC is 14 cm, the length of the diagonal BD will be
24 cm
36 cm
42 cm
42 cm
The area of the region swept by the minute-hand, 7 cm long, of a wall-clock in an interval of 6 minutes is .
154 cm^{2}
92.4 cm^{2}
15.4 cm^{2}
1.54 cm^{2}
The perimeter of an equilateral triangle is equal to the circumference of a circle. The ratio of their area is
The areas of a circle and a square are same. The ratio of the side of the square to the radius of the circle is
2π: 1
1: 2π
If the radius of a circle is increased by 27%, then its area will increase by
61.29%
54%
27%
30.645%
The base angle of an isosceles trapezium is 45°. If the shorter side and both the equal sides are 10 cm each, what is the area of the trapezium?
The length of side AB and side BC of a scalene triangle ABC are 12cm and 8 cm respectively. The size of angle C is 59°. Find the length of side AC.
12
10
14
16
A well of diameters 3m is dug 14m deep. The Earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 4m to form an embankment. Find the height of the embankment.
4.25 m
2.250 m
1.125 m
1.125 m