Question

the diameter of the lower and upper ends of a bucket in the form of frustum and 30 cm respectively if its height is 24 cm find the area of the metal sheet used to make the bucket and why we should avoid the bucket made by ordinary plastic​

Answer 1

We should avoid buckets made of plastic because it is a non biodegradable product so it can cause pollution in the environment.. Also it can't hold heavy loads... 

Hope this helps you....