Question

Equal sized square pieces of three different fabrics X, Y and Z were taken and spread out on a floor. Three small similar metal balls were each rolled with equal force from one end diagonally to the other end of fabric piece. Time taken by the balls to reach other end of fabric was noted to be as follows:

X	Y	Z
2.5 sec	2 sec	4 sec

Now, select the correct option regarding this.

• A. Fabric Z can be obtained from the stem of a plant and fabric Y can be obtained from larva of an animal.
• B. Fabric Z can be obtained from seeds of a plant and fabric Y can be obtained from stem of a plant.
• C. Fabric Y can be obtained from the fur of an animal and fabric X can be obtained from larva of an animal.
• D. Fabric Y can be obtained from the fur of an animal and fabric Z can be obtained from larva of an animal.

Answer 1

The correct option is A Fabric Z can be obtained from the stem of a plant and fabric Y can be obtained from larva of an animal.

The metal ball will take the least time for moving in the case of fabric that has smooth texture, and on the other hand, it will take maximum time on the fabric with rough texture.
Fabric Y is silk which is derived from the larva of an insect. Silk has a very smooth texture. Therefore, metal ball takes the least time. Fabric Z is jute fabric obtained from the stems of the plant, which is very rough in texture. So metal ball takes maximum time to reach other end of fabric.