We are driving along a highway at a constant speed of 55 miles per hour (mph). You observe a car one half mile behind you. The car is moving fast and zooms past you exactly one minute later. How fast is this car traveling (mph) if its speed is constant?
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Well to travel half a mile in a minute you would have to be going 30 mph but to overtake someone ahead going 55 mph they would have to be going 85 mph because that is 30 mph more than 55 mph but if you mean 1 and a half miles it would be 90 mph more making the other car's speed 145 mph.
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34
Answer:
85
Explanation:
The car moves 1/2 mile in 1 minute.
Speed of the car = 1/2 mile for 1 min.
30 miles for 60 min(1 hr).
Therefore, speed of car is 30 mph.
Also, speed of the observant car is 55 mph.
And both are moving in the same direction, we must add the speeds.
So, speed of the car = (55 + 30) mph
= 85 mph.
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