Pregunta
A rectangular field is 50 yards wide and 100 yards long. Give the length and width of another rectangular field that has the same perimeter but a smaller area. width \( =\square \) yards length \( =\square \) yards
Ask by Stuart Pearson. in the United States
Mar 17,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
Responder
Width = 40 yards
Length = 110 yards
Solución
We start with the original field dimensions:
- Width \( w_1 = 50 \) yards
- Length \( l_1 = 100 \) yards
The perimeter is given by
\[
P = 2(w + l)
\]
For the original field, the perimeter is
\[
P = 2(50 + 100) = 2(150) = 300 \text{ yards}
\]
Any other rectangle with the same perimeter must satisfy
\[
2(w + l) = 300 \quad \Longrightarrow \quad w + l = 150
\]
The area of a rectangle is
\[
A = w \times l
\]
The original field has an area
\[
A_1 = 50 \times 100 = 5000 \text{ square yards}
\]
To find another rectangular field with the same perimeter but a smaller area, we can choose any pair \( (w, l) \) such that
\[
w + l = 150
\]
and
\[
w \times l < 5000.
\]
One possible choice is to let
\[
w = 40 \text{ yards}.
\]
Then
\[
l = 150 - 40 = 110 \text{ yards}.
\]
The area of this new field is
\[
A_2 = 40 \times 110 = 4400 \text{ square yards},
\]
which is indeed smaller than \( 5000 \) square yards.
Thus, one acceptable answer is:
- Width \( = 40 \) yards
- Length \( = 110 \) yards.
Respondido por UpStudy AI y revisado por un tutor profesional
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Extra Insights
To maintain the same perimeter of 300 yards (calculated as \(2 \times (50 + 100)\)), we can explore the dimensions of a different rectangle. For example, a width of 40 yards and a length of 110 yards would keep the perimeter the same but give an area of 4,400 square yards, which is smaller than the original area of 5,000 square yards. So, you could have: width \( = 40 \) yards length \( = 110 \) yards

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