Answer:
12:07 pm
Step-by-step explanation:
The question is on relative speed
<u>Calculate the distance covered by truck after 3hours and 10 minutes</u>
Given; speed of truck= 40mph
Time the truck took to travel before the car started to drive from point A= 3h 10 minutes
Change hours to minutes= (60×3) + 10 = 190 minutes
Formulae for speed, S=d/t where S is speed of truck, d is distance covered and t is time
if S=d/t then distance d=S×t
d= 40×190/60 =380/3 =126.67 miles
<u>Finding the time the car catch up with the truck</u>
t=d/S where d=126.67 miles and speed of car = 60mph
t= 126.67/60 = 2.11 hours
Change hours to minutes
1 hr=60minutes
2.11 hrs= 2.11×60=126.67 minutes⇒2hrs and 6.67 minutes
t⇒2 hrs 7minutes
Add to the departure time
10.00 + 2: 07 = 12:07 pm
so 
and 
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. 4 is a perfect square that can be pulled out as a 2, so the length of x is 
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