A trapezium with 3 equal sides and one side double the equal side
can be divided into __________ equilateral triangles of _______ area.
The perimeter of a rectangle becomes __________ times its original
perimeter, if its length and breadth are doubled.
The curved surface area of a cylinder is reduced by ____________
per cent if the height is half of the original height.
The volume of a cylinder becomes __________ the original volume if
its radius becomes half of the original radius.
Classify the changes involved in the following processes as physical or
chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f) Digestion of food
If a cube fits exactly in a cylinder with height h, then the volume of
the cube is __________ and surface area of the cube is __________.
If the diagonals of a rhombus get doubled, then the area of the
rhombus becomes __________ its original area.
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