Answered

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A truck heads north at a constant speed of
80 km/h. A car leaves 20 minutes later
heading north along the same road and
travelling at a constant speed of 90 km/h.
Writr an equation that could be used
to determine how much time in hours( t) the car
travels until it catches up to the truck?

Sagot :

pepe11
equation of the travel of the truck: y = 80.x         (x in hours)
equation of the travel of the car   : y = 90(x - 1/3) 
when they meet: 80x = 90x - 30 => 10x = 30 => x = 3h
They'mm meet after 3 hours
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