Answer:
There are 14 speed limit signs on the highway
Step-by-step explanation:
We can solve this questions by unitary methods.
∵ At every [tex]\frac{7}{8}[/tex] kilometers number of speed limit signs = 1
∴ At every 1 kilometer number of speed limit signs = [tex]\frac{1}{\frac{7}{8}}[/tex] or [tex]\frac{8}{7}[/tex]
∴ Then on a highway having length [tex]12\frac{1}{4}[/tex] km or [tex]\frac{49}{4}[/tex] km number of speed limit signs = [tex]\frac{8}{7}\times \frac{49}{4}[/tex]
= 14 speed limit signs
Therefore, there will be 14 speed limit signs on the highway.
