Ineed to find the area of a rocket 1 liter bottle with radius =40mm the bag coefficient is 0.299 for the 150 mmlong nose cone velocity is 30 m\s what is the frontal area

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2