Question

An open cylindrical pipe of radius 7 m and height 3 m is made from a metal sheet al. How much sheet of metal is required?​

Answer 1

Answer:

Total surface area of the cylinder =2π×r(h+r)

=2×

7

22

×7×(7+3)=44×10=440m

2

Sheet of metal required =440m

2

Answer 2

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• In Cylinder,

Radius (r) = 7m

Height (h) = 3m

To Find :-

• How much sheet of metal is required ?

Solution :-

Using Formula :-

• Total surface of cylinder = 2 π × r ( h + r )
• Taking π value = 22/7

=> 2 × 22/7 ( 7 + 3 )

• => 2 × 22/7 × 7 × 10

=> 2 × 22 × 7

=> 440m²