A man donates 10 aluminumcm and has its upper and lowest ends of radiu

1.	A man donates 10 aluminumcm and has its upper and lowest ends of radius 36 cm and 21 cm respectively, Find the cost ofpreparing 10 buckets if the cost of aluminum sheet is Rss 42 per 100 cm2. Write your comments onthe act of the man.buckets to an orphanage. A bucket made of aluminum is of height 20
Answer» 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

A man donates 10 aluminumcm and has its upper and lowest ends of radius 36 cm and 21 cm respectively, Find the cost ofpreparing 10 buckets if the cost of aluminum sheet is Rss 42 per 100 cm2. Write your comments onthe act of the man.buckets to an orphanage. A bucket made of aluminum is of height 20

Answer»

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