1. The surface area of a cube is 486 sq.cm. what is its volume? (3)
1) 512 cu.cm
2) 81 cu.cm
3) 729 cu.cm
4) 216 cu.cm
5) None of these
2. The radius of the base of a cone is 4m. Find the height so that the volume may be equal to that of a sphere with diameter 4m. (1)
1) 2m
2) 5m
3) 6m
4) 4m
5) None of these
3. A rectangular paper of length 22cm and width 12cm is rolled to form a cylinder with height equal to the width of the paper. What is its volume? (3)
1) 600 cu.cm
2) 582 cu.cm
3) 462 cu.cm
4) 384 cu.cm
5) None of these
4. A room is 7.5 m long, 5.5 m broad and 5 m high. What will be the expenditure in covering the walls by paper 40 cm broad at the rate of Rs.15 per meter? (2)
1) Rs.4250
2) Rs.4875
3) Rs.4125
4) Rs.4675
5) None of these
5. The radius of a sphere is 3cm. It is melted and drawn into a wire of radius 0.02cm. What is the length of the wire? (3)
1) 200m
2) 800m
3) 900m
4) 600m
5) None of these
