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Untitled.notebook
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Untitled.notebook
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A woman (Mrs. Kidd) is driving North at a rate of 17 m/s.
20 m ahead of her, she sees a railroad track that is perpendicular to the road. There is a train going East on
the track crossing the road. The woman randomly finds a
radar gun in her purse (because all women carry radar guns
in their purses) and determines the engine is 35 m from her
and the distance between her car and the engine is increasing at a rate of 5 m/s. What is the speed of the train? Dec 9­9:04 AM
Water drains out of a container in the shape of
an inverted square pyramid at the rate of 100 cm^3 / min. The height of the pyramid is
equal to 1/2 the edge of the square base. How fast is the water level falling when the water is 10 cm deep? (Recall that the volume of a square pyramid
is V = 1/3 Ah where A is the area of the base
of the pyramid).
Dec 9­9:26 AM
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