A man donates 10 aluminium buckets to an orphanage. A bucket made of a

1.	A man donates 10 aluminium buckets to an orphanage. A bucket made of aluminium isof height 20 cm and has its upper and lowest ends of radius 36 cm and 21 cm respectivelyFind the cost of preparing 10 buckets if the cost of aluminium sheet is R 42 per 100 cm2
Answer» Answer: Rs 4950 Step-by-step explanation: Find the surface area of 1 bucket: Surface Area = π(R - r)√[(R - r)² + h²] Surface Area = π(36 - 21)√[(36 - 21)² + 20²] Surface Area = 375π cm² Find the surface area of 10 buckets: 1 bucket = 375π cm² 10 buckets = 375π x 10 = 3750π cm² Find the cost: 100 cm² = Rs 42 3750π cm² = 42/100 x 3750π = Rs 4950 Answer: The cost is Rs 4950

A man donates 10 aluminium buckets to an orphanage. A bucket made of aluminium isof height 20 cm and has its upper and lowest ends of radius 36 cm and 21 cm respectivelyFind the cost of preparing 10 buckets if the cost of aluminium sheet is R 42 per 100 cm2

Answer»

Answer:

Rs 4950

Step-by-step explanation:

Find the surface area of 1 bucket:

Surface Area = π(R - r)√[(R - r)² + h²]

Surface Area = π(36 - 21)√[(36 - 21)² + 20²]

Surface Area = 375π cm²

Find the surface area of 10 buckets:

1 bucket = 375π cm²

10 buckets = 375π x 10 = 3750π cm²

Find the cost:

100 cm² = Rs 42

3750π cm² = 42/100 x 3750π = Rs 4950

Answer: The cost is Rs 4950