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3 years ago

Need help finding this answer

Mathematics

2 answers:

Cloud [144]3 years ago

4 0

Answer: The first option.

Step-by-step explanation:

1. The formula for calculate the perimeter is:

P=2l+2w

Where l is the lenght and w is the width.

2. The first perimeter is:

$P_1=2(105m)+2(12.5m)=235m$

3. If you multiply the dimension by a scale of factor of 2, is the same as write the following expression:

$P_2=2(2l+2w)$

Where $2l+2w$ is the first perimeter.

4. Then:

$P_2=2(235m)=470m$

Alex3 years ago

4 0

Answer:

First option is correct.

Step-by-step explanation:

Case first : Length =105m

width = 12.5 m

Perimeter formula = 2 [ length +width]

= 2 [ 105m + 12.5m ]

= 2(117.5)

=235m

Case Second when dimensions are multiplied by 2

Length = 2 (105m ) = 210 m

width = 2(12.5) = 25m

Perimeter = 2 [ 210+25]

= 2 [235]

= 470 m = 2 times 235

perimeter is increased by factor of 2.

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