another hard question

[half hatch]

help needed

[leaden kayak]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with:

+close

3. Feel free to nominate the person for helper of the week in #helper-nominations

[undone anchor]

Well, we have S = πr^2. So, express r from here and calculate it.

[half hatch]

whats S

[half hatch]

?

[undone anchor]

Area, as usual.

[half hatch]

ok

[half hatch]

i still dont understand

area=pi x radius x radius

would that be right

[paper blade]

Yes

[paper blade]

Right

[half hatch]

ok