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Mathematics 9 Online
OpenStudy (oleg3321):

Please help

OpenStudy (oleg3321):

OpenStudy (oleg3321):

How would i find this?

ganeshie8 (ganeshie8):

Basically they want you find the amount of paint required to paint the visible outer surface

ganeshie8 (ganeshie8):

Top surface a circular disc Can you find its area ?

ganeshie8 (ganeshie8):

|dw:1468306845216:dw|

ganeshie8 (ganeshie8):

Area of green shaded region = ?

OpenStudy (oleg3321):

10mm?

ganeshie8 (ganeshie8):

No 10mm is diamete, not area

OpenStudy (oleg3321):

78.54?

ganeshie8 (ganeshie8):

Yes, thats the area of just the green region

ganeshie8 (ganeshie8):

Need to find the lateral area too

ganeshie8 (ganeshie8):

Lateral area = pi*r*L where r = radius L = slant height

OpenStudy (oleg3321):

219.91?

ganeshie8 (ganeshie8):

Yes, add that to the green area

OpenStudy (oleg3321):

298, C. Thanks

ganeshie8 (ganeshie8):

yw

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