can someone please help me solve. like now? or in a few minutes tops

Explanation:
Hunk
s=540 km, v=90km/hr t=540/9= 6hrs
Tim completed the same journey 1hr30min less than Hunk
Tim's t= 6 - 1.5 = 4.5hrs
av speed = total dist/time taken
= 540/4.5
= 120km/hr
Goodluck