Step-by-step explanation:
change the unit
50 km per 1 hour
50 km/h = 50,000 m/ 3600 s = 13.8 m/s
the lorry speed is 13.5 m/s or 0.3 m slower than the limit
Gain - loss = profit
55- 45 = $10 net profit
3 of 5 because you can halve each number for example 6 can be halved to make 3 and 10 can be halved to make 5
