Q. 563.9( 17 Votes )
(i) Given: R = 15cm; r = 5cm; h = 24cm
Curved Surface Area of Frustum
Where, R = Larger radius of the frustum
r = Smaller radius of the frustum
h = Height of the frustum
CSA of the frustum
Area of the base of the bucket = Area of circle
where “r” is the radius of circle
= π(5)2 = 78.5sq.cm
So, total area pf the bucket = CSA of the frustum + Area of the circle
= 1632.8 + 78.5 = 1711.3 sq. cm
1711.3 sq. cm of metal sheet is required to make the bucket.
(ii) We should use biodegradable materials for the bucket which can be decomposed by the natural processes of the environment. Ordinary plastic is not biodegradable and can cause soil pollution. It can also harm animals if consumed.
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