Question

⭐QUESTION:

A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal. How much sheet of metal is required?

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Answer 1

Answer:

440m sq

Step-by-step explanation:

Radius = 7 m height = 3m

TSA of a cylinder = 2πr (h+r)

2 x 22/7 x 7 (7+3)

2 x 22 (10)

44 x 10= 440 m sq

Answer 2

Given:

A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal.

To Find:

How much sheet of metal is required?

Solution:

As we know that,

▶ Area of closed cylinder = Curved surface area of cylinder = 2 ( Area of circle)

=> 2πrh + 2πr²

=> 2πrh (r + h)

Here,

➝ π = 22/7

Substituting the values in the Formula.

We get,

=> 2 × 22/7 x 7 (7 × 3)

=> 2 × 20 (10)

=> 44 x 10

=> 440 cm²

▶ Hence Solved!

⭐Hope it helps ü! :)