A water sprinkler is set to shoot a stream of water a distance of 12 meters and rotate through an angle of 40 degrees. (a)For r=12 meters, what angle...

A water sprinkler is set to shoot a stream of water a distance of 12 meters and rotate through an angle of 40 degrees.(a)For r=12 meters, what angle is required to water twice as much area?(b) for an angle of 40 degrees, what range for the water stream is required to water twice as much area ?