Asked by Ayomide

A lamp shade like that of fig 15.26 has a height of 12 cm and upper and lower diameters of 10 cm and 20 cm
A.what area material is required to cover the curve surface of the frustum
B.what is the volume of the frustum?
( Give both answers in terms of pie)

Answers

Answered by bobpursley
http://cdn-6.analyzemath.com/Geometry_calculators/frustrum_1.gif
Answered by Abiodun
(a) 195πcm (b) 700πcm
Answered by Anonymous
How do you get it
Answered by Anonymous
How do you get it
Answered by Anonymous
How did you get it
Answered by Samuel
A) with lettering by similar triangles= x/5=12/5.
Cross multiply
x=12.
Pythagoream theorem equation: where s is slant height.
s^2=(R-r)^2+h^2
s^2=(10-5)^2 + 12^2
s^2=5^2+12^2
s^2=25+144
s^2=169
Squareroot bothside
s=13.
Surface area of frustum=
Pie*10*26-pie*5*13
=Pie260 - pie65
=pie(260-65)
=pie195 cm^2.

B) volume=1/3*pie*h(R^2+R*r+r^2)
1/3 pie 12(10^2+10*5+5^2)
1/3 * pie *12*175
2100pie/3
=700piecm^3
Answered by Queen Priscilla SS1SC
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Answered by Michael
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Answered by Ayomide
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Answered by Gift
I don't understand
Answered by Tomiwa
I understand
Answered by Joshua
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Answered by Adeola Seun
Self explanatory
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Answered by Khafiana
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