r/MathHelp • u/EMMAaustengirl • 19h ago

I need help with question 10, in link below.

I need help with question 10. I can't seem to figure it out. All the answers I come up with don't match the choices for what I can pick for the answers. What am I doing wrong? Which answer do you guys get, and please say how you got there in detail?

  • Assuming the Popcorn bucket thing is cone shaped then
    • Radius = 3 in
    • Height = 5 in

  • Use the cone-volume formula: V=13πr2h I keep getting 47.1 as my answer. If so the then the closest choice is 49 in. But unless I'm wrong the answer brightly is giving is 41.7 inch, is this a typo/glitch and the numbers have been transposed? like instead of 47.1 it's showing 41. 7? or have i just got the wrong idea? Should I have rounded up somewhere?

    https://brighterly.com/wp-content/uploads/2024/11/4-Math-test-for-grade-8-1024x683.png

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u/Narrow-Durian4837 19h ago

Yeah, unless there's something I'm missing it's probably a typo.

1

u/LeoMaths 13h ago

Le volume d'un cône est V=⅓ πr²h.

Dans votre cas, V=47.12389 in³. Il y a donc une faute de frappe du côté de Brighterly.