Question

How much sheet is required to prepare 50 open cylinders of height 15 cm and diameter 4 cm ? What Will be the total cost at the rate Rs.20 for 100 sq cm sheet ? (???? = 3.14)

Answer 1

Answer:

Step-by-step explanation:

Height of the cylinder = 15 cm  (Given)

Diameter of the cylinder = 4cm (Given)

Thus, radius of cylinder = 4/2 = 2 cm

Surface area of the cylinder = 2πr² + 2πrh

Surface area = 2π (2)² + 2π (2) (15)

= 2 × 3.14 × 4 + 2 × 3. 14 × 30

= 213. 5 cm²

Surface area of 1 cylinder : 213.5 cm²

Surface are of 50 cylinders = 213.5 x 50

= 10695

Thus, the surface area of 50 cylinders is 10695 m²

Cost of 100 sq m = 20

Total expenditure = 20 × 10695/100 = 2139.

Answer 2

Step-by-step explanation:

9,420 this is the answer