Question 1204799
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You can't determine the number of circles by dividing the total area of the roll of material by the area of each circle, as the other tutor did.  That result would mean every square cm of the roll is being used, which of course it is not.<br>
The width of the roll is exactly enough for three circles side by side: 150/35 = 3.<br>
The length of the roll is enough for 57 rows of circles: 2000/35 = 57.14...<br>
So the number of circles that can be cut from the roll is 57*3 = 171.<br>
It might be that placing the circles in a hexagonal honeycomb pattern would make it possible to get more than 171 circle from a roll.  The would allow more rows of circles on the roll.  However, with half the rows having three circles each and half having only two, the total number of circles possible from the roll is less than 171.<br>
So 171 circles can be cut from each roll.<br>
Use that figure to answer the remaining questions.<br>