matthewsingh9280 matthewsingh9280 21-10-2022 Physics Answered 40. a motorboat travels at 40.0 m/s. it heads straight across a river 320 m wide. a.) if the water flows at the rate of 8.0 m/s. what is the boat's velocity with respect to the shore? b.) how long does it take the boat to reach the opposite side?