Question 1060748
A conical candle is to be made from 300cm^3 of wax.If the candle's height is 5 times its diameter, what should be its height, to the nearest tenth?
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For a cone,
{{{Vol = pi*r^2*h/3 = 300}}}
h = 5d = 10r
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{{{300 = pi*r^2*10r = 10r^3*pi}}}
{{{r^3 = 30/pi}}}
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Use a calculator from here.