Question

A lorry is travelling at 13.5 m/s along a stretch of road where the speed limit is 50km/h. Show the lorry is travelling below the speed limit.

Answer 1

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,

$\frac{km}{hr}=\frac{1000\ m}{60\times 60\ s}$

$\frac{km}{hr}=\frac{5}{18}\frac{m}{s}$

$\frac{m}{s}=\frac{18}{5}\frac{km}{hr}$

Multiply the given number by 18/5,

$13.5\frac{m}{s}=\frac{18}{5}\times 13.5 \frac{km}{hr}$

$13.5\frac{m}{s}=48.6\frac{km}{hr}$

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.