A surveyоr wаnts tо find the shоrtest distаnce аcross a section of river. A stake is placed on each bank of the river as shown in the figure. She measures a distance of 30.0 m from one stake to another on the same side of the river, thus finding the third leg on a right triangle. She then measures the angle q and finds it equal to 75.9°. What is the shortest distance across this section of river?