2 years ago

What 124.2÷9 step-by-step explanation please help !! ( long division ..”

Mathematics

1 answer:

Andre45 [30]2 years ago

5 0

Answer: 13.8

Step-by-step explanation:

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When you divide 972 by 10.8 you get the answer of 90. Hope this helps :)

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Solve x − y = 5 for y.

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3 years ago

A hollow metallic cylinder is made from a metallic sheet of 2.4 cm thickness. The inner

butalik [34]

Answer:

The volume of the metal used is 5277.9 cm³.

Step-by-step explanation:

The volume of a cylinder is given by:

$V = \pi r^{2} h$

Where:

r: is the radius

h: is the height = 50 cm

The volume of metal ( $V_{m}$ ) can be found by subtracting the internal volume ( $V_{i}$ ) from the external volume ( $V_{e}$ ):

$V_{m} = V_{e} - V_{i}$

$V_{m} = \pi r_{e}^{2} h - \pi r_{i}^{2} h$

The external radius is given by the sum of the internal radius with the tickness:

$r_{e} = t + r_{i}$

Hence, the volume is:

$V_{m} = \pi*50 cm((2.4 cm + 5.8 cm)^{2} - (5.8 cm)^{2}) = 5277.9 cm^{3}$

Therefore, the volume of the metal used is 5277.9 cm³.

I hope it helps you!

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3 years ago