1. The problem statement, all variables and given/known data Snow began to fall during the morning of February 2 and continued steadily into the afternoon. At noon a snowplow began removing snow from a road at a constant rate. The plow traveled 6 km from noon to 1 P.M. but only 3 km from 1 P.M. to 2 P.M. When did the snow begin to fall? 2. Relevant equations t = time x(t) = distance dx\dt = speed of the plow b - the number of hours before noon that it began to snow 3. The attempt at a solution I know that the speed of the plow is (6 + 3) /2 hours = 4.5km\hour I am trying to figure out an expression for the height of the snow at time t and then use the given ingormation that the rate of removal R is constant, and thus, find the time it began to snow Can somebody help me out please?