If you paint 1/3 of a wall in 1/4 hour.at that rate,how long will it take you to paint one wall?
1 answer:
You might be interested in
Let r be a radius of a given circle and α be an angle, that corresponds to a sector.
The circle area is
and denote the sector area as 
.
Then
(the ratio between area is the same as the ratio between coresponding angles).
.
The circle area is
Then