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Vsevolod [243]
2 years ago
8

A hemispherical bowl is made of 0.50 cm thick brass. The inner radius of the bowl is 6 cm. Find the outer and inner curved surfa

ce area and volume of the bowl.
Mathematics
1 answer:
Alona [7]2 years ago
3 0

Surface area of Sphere = 4πr²

* The bowl, is half a sphere (hemisphere)

Inside radius, r = 6 cm

inside hemisphere surface area = (1/2)4π(6)²

= 2π36

= 72π

= 226.2 cm²

-----------------------------------------------

Outside hemisphere surface area = (1/2)4π(6.5)²

= 2π(42.25)

= 84.5π

= 265.5 cm²

--------------------------------------------

Volume of Sphere = (4/3) πr³

1/2 of this fills the bowl, hemisphere

inside Hemisphere volume = (1/2)(4/3)π(6)³

= (2/3)π(216)

= 144π

= 452.4 cm³



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Find pb, if pj=14 and jb= 28
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Step-by-step explanation:

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pb = 42 is your answer.

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Draw a diagram of a right trapezoid . 
<span>B ---------------- C </span>
<span>.| ............ ............ * </span>
<span>.| ............ ............ ..... * </span>
<span>A --------------- -------------- D </span>
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<span>Longer base AD = 12cm </span>
<span>Shorter base BC = 8cm </span>
<span>Angle A is 90° , so △BAD is a right triangle . </span>
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