Asked by Kristie
And armored truck left a federal bank at noon when a shipping error was discovered an agent was sent by helicopter to overtake the truck the helicopter left at 1:48 PM and flew at an average speed of 170 km/h. If the truck was overtaken at 3:24 PM what was the average speed of the truck
Answers
Answered by
Steve
time of truck: 15:24-12:00 = 204 minutes
time of flight: 3:24-1:48 = 96 minutes
So, if the truck's speed was x km/hr, we have
(x km/hr)(204 min) = (170 km/hr)(96 min)
x = 170*96/204 = 80
You could convert everything to m/s, or use fractional hours or something, but if you keep track of the units, things will work out ok.
time of flight: 3:24-1:48 = 96 minutes
So, if the truck's speed was x km/hr, we have
(x km/hr)(204 min) = (170 km/hr)(96 min)
x = 170*96/204 = 80
You could convert everything to m/s, or use fractional hours or something, but if you keep track of the units, things will work out ok.
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