Question

The characteristics of different fibres are listed as
W: I am strong, elastic, light and burn slowly.
I shrink on heating and form hard beads with smell of burning hair.
X: I burn completely leaving least residue.
Y: I can be woven like silk fibres and dyed in a wide variety of colours. I burn quickly with a
smell of burning paper.
Z: I do not get wrinkled easily. I burn slowly and produce black smoke.
W, X, Y and Z are respectively​

Answer 1

W. Acrylic

X. Cotton

Y. Rayon

Z. Polyester

Answer 2

-2/3 x 3/5 + 5/2 - 3/5 x 1/6 = -2/3 x 3/5 - 3/5 x 1/6 + 5/2 ( Using commutativity of rational number) = (-3/5) x (2/3 + 1/6) + 5/2 (Distributivity) = (-3/5) x (2x2 + 1/6) + 5/2 = 0-3/5) x (5/6) + 5/2 = (-3/6) + 5/2 = (-3+5 x 3/6) = (-3 + 15/6) = 12/6 = 2Read more on Sarthaks.com - https://www.sarthaks.com/105267/using-appropriate-properties-find-i-2-3-x-3-5-5-2-3-5-x-1-6