Lara is putting lace trim around the border of a circular tablecloth. The tablecloth has a diameter of 1.2 meters. What is the l
ength of the lace she needs? Round to the nearest tenth of a meter.
1 answer:
Answer:
3.8m
Step-by-step explanation:
Since Lara is putting lace trim around the border of a circular tablecloth, by the time she finishes she has covered the circumference.
The circumference of a circle is calculated using:

where d is the diameter of the circle.
It was given that the diameter of the circular table cloth is 1.2 meters.


Therefore the length of the lace she needed is 3.8m
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area = width * length
or
A = W * L
55 = W * (W+6)
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0 = W^2 + 6W - 55
this is a quadratic and has two solutions -11 and 5
a length can only be non-negative so discard -11.
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