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Need help on both problems.

Need help on both problems.-example-1
Need help on both problems.-example-1
Need help on both problems.-example-2

1 Answer

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1)
use Pythagoras, so that

{18}^(2) - {10}^(2) = 224

the square root if 224 is 14.96662955
so roughly, she needs 15ft for the remaining side.
15+10+18=43

so the answer is c.

2)
first calculate the length through the pond

36^2+49^2=3697
square root of 3697 =60.80296045

36+49=85
85-60.80296045=24.19703955

so he saves about 24.2m
User Morothar
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