Question

B. Fill in the blanks:
1. Synthetic fibres absorb very little water. This property is called
on heating
2. Thermosetting plastic does not become
3. Plastic wastes dumped in water cause
is a common plastic known for its lightness and rigidity.
C Match the following:​

Answer 1

Answer:

Perimeter of trapezium = 104 m

Length of Non-parallel sides = 18 m and 22 m

Altitude = 16m

Area of Trapezium = 0.5 * (sum of parallel sides)*altitude ------ (1)

Sum of parallel sides = Perimeter - (sum of non-parallel sides) = 104 m - (18+22)m = 104-40 m = 64 m

From (1), Area of Trapezium = 0.5*64*16 = 512 m^2

Ans: Area of trapezium = 512 m^2

Answer 2

Synthetic fibres absorb very little water. This property is known as spinning. Thermo plastic is a common plastic known for its lightness and rigidity.