<PRE><B>Question 133206</B>
100/50=100/x+1/3
100/x=100/50-1/3
100/x=2-1/3
100/x=5/3 cross multiply.
5x=300
x=300/5
x=60 mph would get the train there on time.
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20*16=320 ft^2 is the area of the room.
area of the carpet:
(20-3*2)(16-3*2) each dimension has  2 3 feet wide edges.
(20-6)(16-6)=14*10=140 ft^2 is the area of the carpet.
320-140=180 ft^2 is the area of the margin.
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