1. A copper wire is bent in the form of square with an area of 121 cm². If the same wire is bent in the form of a circle, the radius (in cm) of the circle is (Take 22/ 7 )

(a) 7
(b) 10
(c) 11
(d) 14

2. The areas of three consecutive faces of a cuboid are 12 cm² , 20cm² and 15 cm² , then the volume (in cm³) of the cuboid is

(a) 3600
(b) 100
(c) 80
(d) 60

3. Water is flowing at the rate of 5 km/h through a pipe of diameter 14 cm into a rectangle tank which is 50 m long, 44 m wide. The time taken, in hours, for the rise in the level of water in the tank to be 7 cm is

(a) 2
(b) 3/2
(c) 3
(d) 5/2

4. The wheel of a motor car makes 1000 revolution in moving 440 m. The diameter (in meter) of the wheel is

(a) 0.44
(b) 0.14
(c) 0.24
(d) 0.34

5. The sides of a triangle are in the ration 2 : 3 : 4. The perimeter of the triangle is 18 cm. The area (in cm²) of the triangle is

(a) 9
(b) 36
(c) √42
(d) ³√15

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Answers:
1. (a) 2. (d) 3. (a) 4. (b) 5. (d)