How do you work this question out at the bottom? please help?????

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asked Oct 25, 2017 200k views

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How do you work this question out at the bottom? please help?????

How do you work this question out at the bottom? please help?????-example-2

Mathematics
high-school

Sarah W asked

by Sarah W

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2 Answers

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Surface area of the cone:

Answer: l=20 cm.

Damio answered Oct 27, 2017

by Damio

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Question Q1:
Surface area of the cone:

$\pi r l + \pi r^(2)=125 \pi /: \pi rl+ r^(2)=125 5l+ 5^(2)=125 5l+25=125 5l=100 l=100:5=20$
Answer: l=20 cm.

Jrushing answered Oct 29, 2017

by Jrushing

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