Question

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

Answer 1

48600/hour × 1/1000= 48.6km/h

Explanation:

Answer 2

Explanation:

We have been given that a lorry is travelling a 13.5 m/s along a stretch of road where the speed limit is 50 km/h.

Let us convert speed of lorry into km/h. Since 1 hour equals 3600 seconds, so we will multiply 13.5 by 3600 to find the distance traveled by lorry in 1 hour

`\text{Distance traveled by lorry in 1 hour}=(13.5* 3600) \text{meters}}`

`\text{Distance traveled by lorry in 1 hour}=48600 \text{meters}}`

1 km = 1000 meters

So to convert speed of lorry into km/h we will divide distance covered by lorry in 1 hour by 1000.

`\text{Speed of lorry}=\frac{48600\text{ meters}}{\text{hour}}*\frac{1 \text{km}}{1000\text{ meters}}`

`\text{Speed of lorry}=\frac{48.6\text{km}}{\text{hour}}`

Since lorry's speed is 48.6 km/h which is less than speed limit of 50 km/h, therefore, we can say that the lorry is traveling below the speed limit.