Area

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121 The ratio of the areas of the circumcircle and the incircle of a square is

A
2 : 1
B
1 : 2
C
a/2 :1
D
1: a/2

122 A man riding a bicycle, completes one lap of a circular field along it's circumference at the speed of 14.4 km/h in 1 min 28 s. What is the area of the field?

A
7958 sq m
B
9856 sq m
C
8842 sq m
D
Cannot be determined

123 Find the area of the largest triangle that can be inscribed in a semi-circle of radius 9 cm:

A
81 sq cm
B
51 sq cm
C
91 sq cm
D
75 sq cm

124 The area of a rectangle is equal to the area of a circle with circumference equal to 39.6 m. What is the length of the rectangle if it's breadth is 4.5 m?

A
33.52 m
B
21.63 m
C
31.77 m
D
27.72 m

125 The difference between the length and breadth of a rectangle is 23 m. If it's perimeter is 206 m, then it's area is

A
2520 m2
B
2480 m2
C
2420 m2
D
None of these

126 The diagonals of two squares are in the ratio of 3 : 2. Find the ratio of their areas:

A
9 : 4
B
9 : 2
C
9 : 5
D
9 : 7

127 If a wire is bent into the shape of a square, then the area of the square is 81 cm°. When the wire is bent into a semi-circular shape, the area of the semi-circle will be

A
22 cm°
B
44 cm°
C
77 cm°
D
154 cm°

128 The perimeter of a rhombus is 146 cm and one of it's diagonal is 55 cm. Find the other diagonal and the area of the rhombus:

A
1384 cm°
B
1320 cm°
C
1285 cm°
D
1190 cm°

129 The perimeter of two squares is 12 cm and 24 cm. The area of the bigger square is how many times that of the smaller?

A
2 times
B
3 times
C
4 times
D
5 times

130 The difference between two parallel sides of a trapezium is 8 cm. The perpendicular distance between them is 19 cm while the area of trapezium is 760 sq cm. What will be the lengths of the parallel sides?

A
44 cm and 36 cm
B
44 cm and 38 cm
C
36 cm and 25 cm
D
39 cm and 26 cm