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2016-04-04T16:09:49+05:30

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Volume of hemisphere = 2/3πr³ = 2/3×22/7×3.5×3.5×3.5 = 90cm³
volume of cone = volume of top - volume of hemisphere
volume of cone = 231 - 90 = 141 cm³ = 1/3πr²h
π = 22/7 , r= 3.5
h = (141×3×7)/(22×3.5×3.5)
h = 11
height oh the top = 11 + 3.5 = 14.5 cm
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2016-04-04T16:15:05+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Volume of the playing top = volume of cone + volume of hemisphere
⇒ 231 = 2/3π r³ +1/3 Πr²h
     231 =1/3πr²( 2r+h)
     231= 1/3 × 22/7 ×3.5 × 3.5 [ 2 × 3.5 + h ]
     231 = 7.3 × 1.75 [ 7+h]
     231 = 12.8 [ 7+ h]
     231 = 89.6 + 12.8 h
     231- 89.6 = 12.8 h
     141.4 = 12.8 h
       h      = 11.04
therefore the height of the playing top is 11.04 cm


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reload u r page
how??
F5
Everybody needs to understand.
I would suggest using a bit more formatting. New part of the equation should go in new line, this way it would be clearer. I will ask you to edit, if edit option doesn't work, you'll be able to do it anyway now. You have 24h to do that.