1. A paper is in the form of rectangle having length 28 cm and breadth 21 cm. A semicircular portion with breadth as a diameter is cut off. The area of remaining portion is
(a) 400 cm^2
(b) 404 cm^2
(c) 410.75 cm^2
(d) 414.75 cm^2
2. If the radius of circle is increased by 7 5%, then the area is increased by
(a) 150%
(b) 160%
(c) 210%
(d) None of these
3. There is a cylinder circumscribing the sphere. The ratio of their volume is
(a) 1 : 3
(b) 3 : 2
(c) 4 : 5
(d) 5 : 2
4. A sphere, a cylinder and a cone having same radius and height of cylinder and cone are equal to diameter of sphere. Ratio of their volume are
(a) 4 : 3 : 1
(b) 1 : 3 : 4
(c) 4 : 1 : 3
(d) 7 : 4 : 1
5. A rectangular sheet of paper 44 cm × 21 cm is rolled along its length and a cylinder is formed. The volume of cylinder is
(a) 3234 cm^3
(b) 3248 cm^3
(c) 3236 cm^3
(d) None of these
Note : Answers will be updated soon...........
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