A long piece of wood is 8.25 feet long. If this piece were to be cut into 5 equal pieces how long will each piece be?
a. 11.25 inches
b. 19.80 inches
c. 22.75 inches
d. 27.15 inches
Answer : 19.80 inches (answer b)
The student must notice that the dimension of the original piece of wood is in feet units while the answers are in inch units. This is an important observation since all units must match in order to solve the problem. Therefore, as a starting point, we will convert the 8.25 feet into inches. In order to do that, the student must realize that each 1 foot = 12 inches. Therefore:
8.25 feet x [12 inch/1 foot] = 99 inches
(note here that the units for feet are eliminated and we are left with only the inch units we need to continue solving the problem).
Since we need to cut this piece into 5 equal pieces then we must divide the 99 inches by 5 to reach the final answer:
99 inches / 5 = 19.8 inches
©Copyright 2008.Najwa S. Hirn. All rights reserved.
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