ullas.
14:5 and their heights are in the ratio of 7:6. Find the
How many wooden
vooden sheets of size 40 cm x 10 cm x 2 cm can be prepared from
10 cm x 2 cm can be prepared from a wooden block wh
nd o cm thick, assuming that there is no wastage?
120 cm long, 30 cm broad and
Notes
. The total surfa
rface area of a solid is the area of all its outer surfaces.
al surface area of a solid is the area all faces of the solid excluding the base and the top
sity to hold certain quantity or the space occupied is known as the volume of the solid.
The lateral surface
The capacity to hold cert:
chand h are length, breadth and height of a cuboid, then
Volume of the cuboid = I xbxh
Volume of the cuboid = Area of base x Height
Total surface area of the cuboid = 2(lb + bh + hl)
Lateral surface area of the cuboid = 2h(1 + b)
a be the length of an edge of a cube, then
Volume of the cube = a3
Total surface area of the cube = 6a2
ateral surface area of the cube= 402
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