Answer :
Width of the model is:
17.5 in
Step-by-step explanation:
The length of the classroom is 2.4 times its width.
Length=2.4×width
The length of the student's model is 42 in.
Let w be the width of student's model.
By using the equation Length=2.4×width , we get
42=2.4×w
⇒ w=(42)/(2.4)
⇒ w=17.5
Hence, width of the model is:
17.5 in
[tex]\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered}\begin{gathered} \small\boxed{\begin{array}{c |c} \tt{Classes} & \tt{Frequency} \\ \dfrac{\qquad\qquad}{ \sf 0-10} &\dfrac{\qquad\qquad}{ \sf 5} & \\ \dfrac{\qquad\qquad}{ \sf 10-20} &\dfrac{\qquad\qquad}{ \sf 10} & \\ \dfrac{\qquad\qquad}{ \sf 20-30} &\dfrac{\qquad\qquad}{ \sf 18} & \\ \dfrac{\qquad\qquad}{ \sf 30-40} &\dfrac{\qquad\qquad}{ \sf 30} & \\ \dfrac{\qquad\qquad}{ \sf 40-50} &\dfrac{\qquad\qquad}{ \sf 20} & \\ \dfrac{\qquad\qquad}{ \sf 50-60} &\dfrac{\qquad\qquad}{ \sf 12} & \\ \dfrac{\qquad\qquad}{ \sf 60-70} &\dfrac{\qquad\qquad}{ \sf 5} &\end{array}} \end{gathered}\end{gathered}\end{gathered}\end{gathered}\end{gathered}[/tex]
