## Mensuration
= 60 x 40 x 50 = 12000 cubic cms
Volume of Cube = Side
=50 As the volume of the cube is greater than that of the cuboid so it will require more material, and the cuboid will require less material
= 2 (80 x 48 + 80 x 24 + 48 x 24) = 2(3840 + 1920 + 1152) = 2 x 6912 = 13824 Hence, Surface Area of 100 suitcases = 1382400 sq cms Required tarpaulin will have same area
Or, 600 = 6 x side Or, Side Or, Side = 10 cm
= 2(1 x 2 + 1 x 1.5 + 1.5 x 2) = 2(2 + 1.5 + 3) = 2 x 6.5 = 13 Area of Bottom Surface = 1 x 2 = 2 sq m Hence, Area Covered by painting = 13-2 = 11 sq m
= 2(15 x 10 + 15 x 7 + 10 x 7) = 2(150 + 105 + 70) = 2 x 325 = 650 Area of Floor = 15 x 10 = 150 Hence, Painted Area =650-150=500 As, one can of paint is enough for 100 sq m So, 500/100 = 5 cans are needed to paint the hall.
= 2 x 7 x (15 + 10) = 14 x 25 = 350 Area of Roof = Area of Floor = 150 Total Area to be painted = 350+150=500
It is clear that the cylinder is having a larger surface area. 7. A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal. How much sheet of metal is required?
Area of Rectangle = l x b Or, l x b = 4224 l x 33 = 4224
10. A company packages its milk powder in cylindrical container whose base has a diameter of 14 cm and height 20 cm. Company places a label around the surface of the container (as shown in the figure). If the label is placed 2 cm from top and bottom, what is the area of the label.
height = 20-4 = 16 cms |