Question

The ratio of the radii of two wheels is 3:4. What is the ratio of their circumferences?
Find the perimeter of a semicircular plate of radius 3.85 cm.
100​

Answer 1

Answer:

Disadvantages of Plastics

Natural decomposition of plastic can last from 400-1000 years and few types of plastics are non-degradable as well.

Plastic materials clog waterways, oceans, seas, lakes etc. ...

Many animals eat plastic materials and die. ...

Plastic is widely used in packaging.