Question

if a man travels at an average speed of 122km per hour how far will he travel in 3 hours and 45 minutes​

Answer 1

Convert 3h and 45 min to hours so it will be 3.9 hours

Then say:
Distance = speed ✖️time
= 122 km/h ✖️3.9h
=475.80 km
He will travel 475.80 km

Hope this helps ;)