A snowplow heads out to plow a 50 mile stretch of highway when there is already an inch of snow on the ground. The snow is falling steadily at a rate of one inch per hour. The speed of the plow is 50/d mph where d is the depth of the snow in inches.

How long does the plow travel this 50 mile stretch of road? (one way)

(In reply to numerical integration by Charlie)

your dt may have been 1/10000 of a second but there is uncertainty in this digit.  In this case it is not a 5.

Is it still called integration when dt has not gone to zero? 

Posted by Jer on 2010-09-13 14:52:02