Question

The radii of the ends of a bucket 16 cm height are 20 cm and 8 cm. The curved surface area of the bucket is
(a)1760 cm²
(b)2240 cm²
(c)880 cm²
(d)3120 cm²

Answer 1

Answer:

The Curved surface area of a Bucket is 1760 cm².

Among the given options option (a) 1760 cm² is the correct answer.

Step-by-step explanation:

Given :  

Height of a conical bucket, (h) = 16 cm

Bigger Radius, R = 20 cm

Smaller Radius, r = 8cm

Slant height of a bucket , l = √(R - r)² + h²

l = √(20 - 8)² + 16²

l = √12² + 16²  

l = √(144 + 256)

l = √400

l = 20 cm

Slant height of a frustum,l = 20 cm

 

Curved Surface area of a Bucket = π(R+ r)l  

= π(20 + 8) × 20

= π(28 × 20 )  

= 22/7 ×  560

= 22 × 80

= 1760 cm²

Curved Surface area of a Bucket = 1760 cm²

Hence, the Curved surface area of a Bucket is 1760 cm².

HOPE THIS ANSWER WILL HELP YOU….

Answer 2

Hope this helps you ! mark as brainliest