Question

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Level - GCSE

I’ll give brainliest to the first person who gets it right with correct working shown.

Good luck :D

Answer 1

Answer:

r=2.9cm

Step-by-step explanation:

we know the formula, mass= density*volume

as a result we can figure out the volume = mass/density

=485/8 cm^3

=60.625cm^3

here comes another formula of volume of cone = $\frac{1}{3}$$\pi$$r^{2}$$h^{}$

we will use this to find the radius,

$\frac{1}{3}$$\pi$$r^{2}$$h^{}$=60.625

$\pi$$r^{2}$$h^{}$=181.875

h is 70mm which we will turn to 7cm

$\pi$$r^{2}$*7=181.875

$r^{2}$=8.27

r=2.875825cm

r=2.9cm

nice question. hope this helps