find the area of the aluminium sheet required to make a cyclindrical c

1.	find the area of the aluminium sheet required to make a cyclindrical container which is open and one side and whose diameter is 42cm and height is 22cm find the approximate area of the aluminium sheet required to make a lid of height 3cm for this container
Answer» Step-by-step explanation: Diameter = 42 cm Radius = 21 cm Height = 22 cm Area of Alumunium SHEET required = CSA + PI r² So, $\sf{ \pi r ( 2h + r)}$ $\sf{ \dfrac{22}{7} \times 21 ( 2(22) + 21)}$ So, this gives out 4290 cm² Now, approximate area of lid = CSA + pi r² But, height is 3 cm now in this case. $\sf{ \pi r ( 2H + r)}$ $\sf{ \dfrac{22}{7} \times 21 ( 2(3) + 21)}$ This gives out 1782 cm². Hence the answers.

find the area of the aluminium sheet required to make a cyclindrical container which is open and one side and whose diameter is 42cm and height is 22cm find the approximate area of the aluminium sheet required to make a lid of height 3cm for this container

Answer»

Step-by-step explanation:

Diameter = 42 cm

Radius = 21 cm

Height = 22 cm

Area of Alumunium SHEET required = CSA + PI r²

So,

$\sf{ \pi r ( 2h + r)}$

$\sf{ \dfrac{22}{7} \times 21 ( 2(22) + 21)}$

So, this gives out 4290 cm²

Now, approximate area of lid = CSA + pi r²

But, height is 3 cm now in this case.

$\sf{ \pi r ( 2H + r)}$

$\sf{ \dfrac{22}{7} \times 21 ( 2(3) + 21)}$

This gives out 1782 cm². Hence the answers.