Answer:
50 km/hr >48.6 km/hr the speed of lorry is less that speed limit.
Step-by-step explanation:
Given : A lorry is travelling at 13.5 m/s along a stretch of road where the speed limit is 50 km/h.
To find : Show the lorry is travelling below the speed limit ?
Solution :
The speed limit is 50 km/h.
A lorry is travelling at 13.5 m/s along a stretch of road.
We have to convert m/s into km/hr,
[tex]\frac{km}{hr}=\frac{1000\ m}{60\times 60\ s}[/tex]
[tex]\frac{km}{hr}=\frac{5}{18}\frac{m}{s}[/tex]
[tex]\frac{m}{s}=\frac{18}{5}\frac{km}{hr}[/tex]
Multiply the given number by 18/5,
[tex]13.5\frac{m}{s}=\frac{18}{5}\times 13.5 \frac{km}{hr}[/tex]
[tex]13.5\frac{m}{s}=48.6\frac{km}{hr}[/tex]
So, A lorry is travelling at 48.6 km/hr along a stretch of road.
As, 50 km/hr >48.6 km/hr the speed of lorry is less that speed limit.
Therefore, The lorry is travelling below the speed limit.
