Transcription of CLASS-VIII SUB-MATHEMATICS MENSURATION(SURFACE …
1 CLASS-VIII SUB-MATHEMATICS MENSURATION(SURFACE area AND VOLUME) Worksheet-1(Basic) I) Multiple choice questions: (1 mark) 1. The volume of a cube of side is a) m3 b) m3 c) 27 m3 d) m3 2. If the heights of a cylinder is halved, its volume will be of its original volume a) 1 times b) 2 1 times c) 2 times d) 3 times 3 3. The lateral surface area of a cuboid whose length, breadth and height are 2a, 2b and 2c respectively is. a) 2(ab+bc+ca) b) 4(ab+bc+ca) c) 8(a+b)c d) none of these 4.
2 The sum of the areas of all faces (excluding top and bottom) of a cuboid is the _ of the cuboid. a) volume b) lateral surface area c) total surface area d)none of these 5. The volume of a cuboid whose length, breadth and height are 2a, 3a and 4a is. a)24a2 b)24a3 c)12a3 d)none of these 6. The curved surface area of a right circular cylinder of radius 2r and height 2h is a)2 rh b)4 rh c)8 rh d)none of these 7. The lateral surface area of a right circular cylinder of radius 3cm is height of the cylinder is a) 5cm b) c) d)none of these 8.
3 If each edge of a cube is doubled, how many times will its volume increase? a)2 times b)4 times c)8 times d)none of these 9. If the volume of a cube is v, then the side(in terms of v) a)v3 b) c)3 d)v2 10. The volume of a cylinder whose diameter is equal to its height is a) r3h b) 3 8 c) 3 8 d)none of these II) Short answer questions type I (2 mark) 11. Find the height of a cuboid whose volume is 756cm3 and base area is 63cm2? 12. The dimensions of a cuboid are in the ratio of 2:3:4 and its total surface area is 280m2.
4 Find the dimensions. 13. If the volume of a cube 14. The circumference of the base of a right circular cylinder is 2m, find the curved surface area of the15. A roller of diameter 70cm the area covered by the roller in 50 III) Short answer questions16. A match box is of dimension 4cm by by will be the volume of a packet containing 12 such match boxes? How many suchcan be placed in card board box whose size 17. Two cubes, each of side 6cm, are joined end resulting cuboid. 18. How many 8cm cubes can be cut out from the cube whose edge 19.
5 The radius and height of a cylinder are in the ratio 5:7 and the volume 550 its total surface20. A rectangular sheet of paper 88cm x 10cm is rolled along its length andcylinder is formed. Find the volume of theIV) Long answer questions21. The students of DAV were asked to participate in a competition and decorating penholders in the shape of a cylinder with the base, using cardboard. Each penholder was to be of radius 3cm and height school was to supply the competitors with cardboard. If there were 35 competitors, how much cardboard wcompetition?
6 22. A cuboid is of dimensions 60cm x 54cm x many small cubes of side 6cm can be placed in the given23. The area of the base of a right circular cylinder is 92400 cm3. Find the area of the curved24. A cube of side 5cm is volume after such The bottom of a tank measures 50m x its depth if 4000m3 of water. 26. A closed cylindrical tank metal. How much sheet of metal 27. A suitcase with measures 80cm x 48cm x 24cm tarpaulin cloth. How many meters of tarpaulin of width cover 100 such The lateral surface area of a hollow cylinder height and formed a rectangular sheet of width the perimeter of rectangular sheet.
7 29. A swimming pool is the cost of cementing its four walls and floor at the rate of 10 per30. Two cylinders of same volume have their radii in the ratio 1 the ratio of their heights. If the volume of a cube is the total surface area of thecircumference of the base of a right circular is 220cm. If the height of the find the curved surface area of the cylinder. 70cm and the length 2m is rolling on the ground .What the area covered by the roller in 50 revolutions? Short answer questions type II (3 mark) of dimension 4cm by by will be the volume of a packet containing 12 such match boxes?
8 How many suchcan be placed in card board box whose size is 60cm x 20cm x cubes, each of side 6cm, are joined end to end. Find the volume of the How many 8cm cubes can be cut out from the cube whose edge radius and height of a cylinder are in the ratio 5:7 and the volume .Find its total surface area . A rectangular sheet of paper 88cm x 10cm is rolled along its length andformed. Find the volume of the cylinder. questions (4 mark) The students of DAV were asked to participate in a competition and decorating penholders in the shape of a cylinder with the base, using cardboard.
9 Each penholder was to be of radius 3cm and height school was to supply the competitors with cardboard. If there were 35 competitors, how much cardboard was required to be bought for of dimensions 60cm x 54cm x many small cubes of side 6cm can be placed in the given cuboid. The area of the base of a right circular cylinder is 15400 cm2 and its volume the area of the curved surface. is cut into 1 cm cubes. Find the percentage increase in cutting. The bottom of a tank measures 50m x its depth if it contains A closed cylindrical tank of radius 7m and height 3m is made from a sheet of metal.
10 How much sheet of metal is required? A suitcase with measures 80cm x 48cm x 24cm is to be covered with a tarpaulin cloth. How many meters of tarpaulin of width 96cm suitcase. The lateral surface area of a hollow cylinder is is height and formed a rectangular sheet of width the perimeter of is 40m in length, 20m in breadth and 5m in depth. Find enting its four walls and floor at the rate of 10 perTwo cylinders of same volume have their radii in the ratio 1 the ratio.
