A boat is being towed at the rate of 12 mi/hr. At the instant (t=0) that thetowing line is cast off, a man in the boat begins to row in the direction ofmotion, exerting a force of 20lb. If the combined weight oftheman and theboat is 480 lb and the resistance in lbs is equal to 1.75v, where v ismeasured in ft/s, find the speed of the boat after ½ min.

A boat is being towed at the rate of 12 mi/hr. At the instant (t=0) that thetowing line is cast off, a man in the boat begins to row in the direction ofmotion, exerting a force of 20lb. If the combined weight oftheman and theboat is 480 lb and the resistance in lbs is equal to 1.75v, where v ismeasured in ft/s, find the speed of the boat after ½ min.